人教版小学数学一年级下册口算练习试题册
小学生文明礼仪歌谣-给大一新生的一封信
一、认识图形
认识图形(1)
9 - 6 =
5 + 4 = 4 + 3 + 6 =
2 + 5
= 10 - 7 = 15 - 7 - 5 =
9 - 2 = 7 + 2 =
3 + 7 - 9 =
11 + 8 = 12 - 2=
14 - 10 + 6 =
17 - 3 = 2 +
9 = 7 + 5 + 5 =
7 + 5 =
20 - 10 = 8 - 3 + 7 =
19 -
9 = 3 + 12 = 13 - 3 + 5 =
8 + 11 = 19 - 4 =
6 + 5 - 7 =
9 - 9 = 4 + 3 =
6 + 6 =
数学小知识
阿拉伯数字
在生活中,我们经常会用到0、1、2、3
、4、5、6、7、8、9这些
数字。那么你知道这些数字是谁发明的吗?
这些数字符号
原来是古代印度人发明的,后来传到阿拉伯,又从阿
拉伯传到欧洲,欧洲人误以为是阿拉伯人发明的,就
把它们叫做“阿
拉伯数字”,因为流传了许多年,人们叫得顺口,所以至今人们仍然
将错就错,
把这些古代印度人发明的数字符号叫做阿拉伯数字。
一、认识图形
现在,阿拉伯数字已成了全世界通用的数字符号。
认识图形(2)
14 + 3 = 8 + 8 = 13 + 7 =
2 + 3 + 6 = 18 -
10 = 13 - 3=
16 - 10 =
9 + 9 - 8 = 6 + 5 =
3 + 8
= 7 + 7 = ( ) + 5 = 10
10 - 7 = 20 - 7 = 19
- 7=
17 - ( ) = 7 9 + 3 =
8 + 6 =
9 + 5 = ( )
- 6 = 6 6 + 12 =
18 - 2 =
20 - 8 = 7 + ( ) = 13
16 - 6
= 14 + 5 = 15 + 3 =
18 - ( ) = 11 18 - 13 = 14
- 3 =
20 - 10 = ( )
+ 16 = 16 2 + 3 + 6 =
数学小故事
还有一个洞
有一次,妈妈很耐心地启发丫丫做算术题:“丫丫,你已经学
会做减法了,对吗?来,我们来看看,4减2等于几?”“等于2,
妈妈。”“太对了,乖孩子。那么,5减5呢?”“5减5,减5.......”
丫丫嘟哝着,“我不会,妈妈。”“孩子,你不可能不会!想想,比
如说你口袋里装着5枚硬币,可是,突然,5枚硬币都掉了。你说,
一、认识图形
口袋里还有什么?”丫丫忽闪着两只大眼睛,说道:“掉了?那,
认识图形(3)
那我的口袋里还有一个洞呀!”
8 - 6 = 5 + 4 =
9 - 9 = 4 + 3 + 6 =
2 + 5 = 10 -
7 = 4 + 3 = 15 - 7 - 5 =
9 - 2 =
7 + 2 = 9 - 6 = 3 + 7 - 9 =
11
+ 8 = 12 - 2= 10 + 8 = 14 - 10 +
6 =
17 - 3 = 2 + 9 =
16 - 6 = 7 + 5 + 5 =
7 + 5 = 20 -
10 = 9 + 4 = 8 - 3 + 7 =
19 - 9
= 3 + 12 = 17 - 10= 13 - 7 + 5 =
8 + 11 = 19 - 4 = 6 + 6 = 6
+ 5 - 7 =
数学小知识
西安半坡出土的陶器有用1~8个圆点组成的等边三角形和
分正
方形为100个小正方形的图案,半坡遗址的房屋基址都是圆形和方
形,可以看出中国古代
人在数学上的领先地位。
一、认识图形
单元测验
2 +( )= 10
4 +( )= 8 5 +( )= 10
9 +( ) =
9 3 +( ) = 7 ( )+ 6 = 10
(
)+ 3 = 9 ( )+ 1 = 10 ( )+ 7 =
10
9 + 2 = 9 + 6 = 8 +
5 =
3 + 8 = 8 + 8 =
7 + 6 =
7 + 8 = 6 + 6 =
3 + 9 =
5 + 6 = 5 + 8 =
4 + 7 =
8 + 4 =
4 + 9 = 6 + 8 =
8 + 7 =
9 + 9 = 5 + 9 =
7 + 7 =
9 + 7 = 0 + 6 =
0 + 0 =
1 + 2 = 1 + 9 =
10-8 =
2 + 3 = 2 + 8 =
4 - 3 =
3 + 6 = 5 - 1 =
6 - 4 =
4 + 6 = 9 - 0 =
数学小知识
七巧板是由下面七块板组成的:完整图案为一正方形:五块等腰
直角三角形(两块
小形三角形、一块中形三角形和两块大形三角形)、
一块正方形和一块平行四边形。
二、20以内的退位减法
十几减9(1)
9 + 2 = 9 +
5 = 6 + 9 = 13 - 9 + 3 =
3
+ 9 = 7 + 9 = 9 + 4 = 12 -
10 - 4 =
7 + 8 = 8 + 5 = 10 - 7
= 9 - 4 + 5 =
9 + 8 = 8 + 6 =
5 + 7 = 15 - 9 - 2 =
9 + 9 = 9
- 9 = 19 - 9 = 13 - 10 + 6 =
13 – 9 = 12 – 9 = 18 – 9 = 11
– 9 =
13 — 9 = 16 – 9 =
12 – 9 =
数学小知识
十几减9的“破十法”儿歌
二、20以内的退位减法
十几减9并不难,“破十”计算变简单
十几减9(2)
十几破成10和几,用10减9剩下1
再加几求得数,最后结果写清楚
12 -
1
9 = 17
-
9=
二、20以内的退位减法
十几减9(2)
6 + 5
= 12 - 2 = 9 + ( ) = 20
4 + 10 = 16 + 3 = 5 +
7 =
9 + ( )=13 9 + ( )=11
9 + ( )=15
9 + ( )=17 9 + (
)=14 9 + ( )=12
9 + ( )=16
9 + ( )=18 11 - 9 =
14 - 9
= 12 - 9 = 17 - 9 =
13 - 9 = 18 - 9 = 16
- 9 =
20 - 9 = 15 - 9 =
19 - 9 =
想:( ) + 9 = 15
想:( ) + 9 = 18
所以:15 – 9 = (
) 所以:18 – 9 = ( )
数学小知识
“想加算减法”
计算十几减9时也可以“想加算减”法,即想 9加几等于13 ,即 9 +()=13
因为9加4等于13,所以 13 - 9 = 4。
二、20以内的退位减法
十几减9(3)
9 +( )=13
9 + ( )=16 9 + ( )=15
13 -( )=9
16 - 9 =( ) 15 - 9 =( )
9 +( )=18
9 +( )=14 9 + ( )=17
18 - 9 =( )
14 - ( )=9 17 - ( )=9
12 - 9 =( )
11 - 9 =( ) 17 - 9 =( )
11 - 9
○
4 13 - 9
○
6
15 - 9
○
9
14 - 9
○
5
12 - 9
○
4 5 + 9
○
13
11 12 13 14
—9
15 16 17 18
二、20以内的退位减法
十几减8
8 + ( )=11
8 + ( )=12 8 + ( )=15
8 +
( )=16 8 + ( )=13 8 + ( )=18
8 + 9 = 8 + 10 = 8 + 2
=
15 - 8 = 12 - 8 =
11-10 + 8 =
11 - 8 = 17 - 8 =
14-10 + 8 =
17 - 10 = 13 - 8
= 16-10 + 8 =
8 + 7 =
16 - 8 = 18-10 + 8 =
12 – 8 =
15 – 8 = 17 – 8 =
数学小知识
十几减8的方法
十几减8可以用“想加算减”的方法,也就是想着8加几
二、20以内的退位减法
十几减7、6
12 - 9 =
17 - 8 = 16 — 7 =
7 + ( ) =16 8 + ( ) = 15
6 + ( ) =14
16 - 9 =( ) 15
- 8 =( ) 14-8 =( )
16 - 7 =( )
15 - 7 =( ) 14-6 =( )
11 - 7 =
12 - 7 = 10-7 + 3=
13 - 7 =
14 - 7 = 10-6 + 5=
数学小知识
计算十几减13 - 7
方法一:“破十法”想11分成10和1,用10-7=3, 3+1=4;
方法二:“想加法算减法”:想7+( )=11,9+ 4 =11,所以 11-7=
二、20
4
以内的退位减法
十几减5、4、3、2
5 + 8 = 9 + 5 = 8 + 5 =
3 + 8 = 8 + 4 =
5 + 9 =
12 - 4 = 12 - 3 =
11 - 2 =
5 + 8 = 4 + 8 =
3 + 8 =
13 - 5= 12 - 4 =
11 - 3 =
12 - 4 = 12 - 5 =
14 - 5 =
12 - 2 = 13 - 4 =
15 - 5 =
14 – 5 = 17 – 5 =
11 – 4 =
12 – 10 = 2 + 9 =
11 – 4 =
10-2
○
10-7
15+4
○
15-4 13-5
○
14-5
数学小故事
100分
期末考试后,小亮回家说:“这回两门考了100分。”爸爸妈妈听
后很高兴。
小亮接着说:“是两门加起来100分。”爸爸听了扬手
就要打,妈妈劝住说:
“语文就算得了40分,算术总该60分吧,
总还有一门及格嘛!”小亮委屈地
说:“妈,不是那么算法!语文
是10分,算术0分,加在一块不正好是100分 吗?”
20以内的退位减法 二、
综合训练(1)
10 – 7 =
15 – 9 = 16 – 8 =
13 – 5 =
11 – 6 = 11 – 6 =
13 – 6 =
16 – 7 = 13 – 5 =
16
– 8 = 13 – 9 = 10 – 9 =
12 – 4 = 15 – 7 = 10 – 5
=
11 – 3 = 12 – 7 =
10 – 9 =
10 – 4 = 11 – 7 =
13 – 9 =
11 - 5 = 10 - 7
= 13 – 8 =
10 - 3 =
11 - 9 = 10 – 1 =
15 - 6=
18 – 9 = 16 – 7 =
14 - 7=
12 – 8 = 13 – 9 =
10 - 3=
17 – 8 = 13 – 6 =
数学小知识
西安半坡出土的陶器有用1~8个圆点组成的等边
三角形和
分正方形为100个小正方形的图案,半坡遗址的房屋基址都是圆
形和方形,可以看出
中国古代人在数学上的领先地位。
以内的退位减法 二、20
综合训练(2)
12 - 7 = 16 - 7 =
15 - 6 =
1 6 - 9 = 15 - 9 =
16 - 7 =
14 - 7 = 16 - 8 =
11 - 9 =
15 - 9 = 11 - 2 =
10 - 3 =
12 - 8 =1 5 - 8 =
13 - 9 =
被减数
11
15
14
13
减数
9
8
5
7
差
( ) - 9=3
9 + ( )=14 12 - ( )=8
7 + ( )=12
13 - ( )=6 ( ) + 6=11
数学小知识
中国著名的数学家有陈景润、祖冲之、谷超豪、苏步青、华罗庚
二、20以内的退位减法
等。
综合训练(3)
11 - 5 = 10 - 7 =
12 - 8 =
12 - 6 = 11 - 3 =
17 - 9 =
10 - 8 = 10 - 3 =
10 - 3 =
15 - 8 = 17 - 8 =
12 - 7 =
15 - 8 = 12 - 8 =
18 - 9 =
10 - 4 = 11 - 2 =
13 - 9 =
被减数 13 11 17 13
减数
差
5
2
8
4
8
9
6
8
11 - =
13 - =
4
7
5
6
二、20以内的退位减法
单元测试
13-5 = 6 + 8 =
10 + 10 =
1 + 12 = 13-5 =
2 + 16 =
7+7 = 5+8 =
8 + 5 =
20-6 = 15-5 =
20-3 =
3 + 16 = 2 + 14 =
5 + 3 =
( ) + 7 = 10 ( ) + 5 = 11
7 + ( )= 16
5 + ( ) = 12 9 + ( )
= 15 ( )+ 4 = 12
3 +( ) = 12 6
+ ( ) = 14 ( + 6 = 15
8 + 6 =
7 + 5 = 6 + 5 = 9 + 3 =
14—8= 12—7= 11—6= 12—9
=
14—6= 12—5= 11—5=
12—3 =
数学小知识
目前最大的数字是:古戈尔(google),相当于10的100次方。
三、分类与整理
12 + 8 = 17 - 4 =
10+1 =
20 - 5 = 12 + 3 =
2 + 9 =
15 - 3 = 4 + 16
= 18 - 3 =
20 - 12 =
3 + 9 = 5 + 4 =
12 + 3 =
3 + 4 = 5 + 8 =
2 + 17 =
6 + 6 = 1 + 17 =
10 + 5 =
13 + 7 = 14 + 5 =
10 + 3 =
12 + 8 = 20 - 12 =
6 + 14 =
2 + 7 = 12 + 6 =
7 + 9 =
14 - 2 = 5 + 13 =
5 + 6 =
8 + 11 = 6 + 13 =
8 -
4 + 14 = 5 + 9 - 5 = 13 - 5 - 6 =
2 + 17 + 1 = 12 - 1 + 4 = 17 - 17 +
9 =
5 + 4 - 2 = 15 - 7 + 2 =
16 - 8 - 4 =
( ) +7 = 10 (
) +5 = 11 7 +( ) = 16
5 +( ) = 12 9
+( ) = 15 ( ) + 4 = 12
被誉为“数学界的莎士比亚”的四大数学家分别是欧拉、阿基米
四、100以内数的认识
德、牛顿、高斯。
数100以内的数和数的组成
数学小知识
12 - 7 = 11 - 3 = 13 - 4 =
11 - 4 = 12 - 5 = 12 – 7
12 - 6 = 15 - 8 = 15 - 7 =
11 - 5 = 13 - 6 = 13 - 8 =
15 - 7 = 14 - 6 = 11 - 5 =
16 - 9 = 11 - 8 = 13 - 7 =
13 - 9 = 13 - 8 = 14 - 7 =
11 - 9 = 12 - 8 = 16 - 7=
14 - 9= 15 - 8= 17 - 9=
11 - 3= 12 - 4= 13 - 4=
数学小知识
读数时,应按从左到右的顺序,从高位读起,如读15,应先读15
位上的数,即十,再读个位上的数五。
四、100以内数的认识
100以内数的读法和写法
18 - 9 =
12 - 8 = 12 - 6 =
13 - 6 =
14 - 8 = 12 - 5 =
11 - 9 =
11 - 3 = 13 - 6 =
读作:______
读作:______ 读作:_____
写作:______
写作:______ 写作:______
二十三写作:_______
四十五写作:_______
十七写作:_______
七十写作:_______
60读作:_______
36读作:_______
63读作:_______
100读作:_______
数学小故事
等车
“爸爸,4路车来了!”“傻瓜,那不是4路,是31
四、100以内数的认识
路!”“老师说,3+1=4
数的顺序和比较大小
14 - 9 = 12 - 6 = 11 - 2 =
17 - 9 = 12 - 7 = 13 - 4 =
13
- 6 = 8 + 7 = 11 - 3 =
14 - 5 = 6 + 9 = 15 - 7 =
17 - 8 = 14 - 7 = 9 + 6 =
1. 100的前一个数是( ),69的后一个数是( )。
2.
与66相相邻的数是( )和( );与89最接近的数是( )
和( )。
3. 最大的一位数是( );最小的两位数是( ),它们的和是
(
),差是( )。
4.75前面四个数是( )、( )、(
)、( );后面第四个
数是( );( )的后一个数是100。
数学小知识
欧几里得最著名的著作《几何原本》是欧
洲数学的基础,提
出五大公设,发展为欧几里得几何,被广泛的认为是历史上最
四、100以内
数的认识
成功的教科书。
整十数加一位数和相应的减法(1)
40
+ 2 = 50 + 2 = 70 + 3 =
10 + 8 = 80 + 0 = 30 + 2
=
3 + 90 = 10 + 6 =
50 + 9 =
11 + 10 = 8 + 80 =
20 + 1 =
6 + 40 = 6 + 50 =
20 + 4 =
90 + 2 = 80 + 4 =
90 + 4 =
60 + 1 = 2 + 60 =
30 + 4 =
1 + 60 = 1 + 90 =
70 + 1 =
90 + 1 = 10 + 7 =
9 + 90 =
40 + 5 = 30 + 5 =
55-50 =
9 + 20 = 50 + 3 =
78 – 8 =
56 – 6 = 78 – 70 =
37 – 30 =
四、100以内数的认识
整十数加一位数和相应的减法(2)
74 - ( )
= 70 4 + ( ) =54 9 + ( ) = 37
46 - ( ) =
6 6 + ( ) = 36 2 + ( ) = 27
( ) - 3 = 30
( ) + 8 = 68 6 + ( ) = 55
2 + 30 = 7
+ 40 = 80 + 1 =
数学小知识
数字“0”最早是中国发明创造的。
70 + 6 = 50 + 9 =
7 + 70 =
50 + 6 = 7 + 50
= 90 + 2 =
43–3 = 78 - 8 = 62–6
=
23 - 3 = 46 - 6 = 49–9 =
66–6 = 55–5 = 27–7 =
33–3 =
89–9 = 72–2 =
51–50 = 23–3 =
45- 5 =
41–1 = 29–20= 75- 70 =
数学小知识
四、100以内数的认识
单元测试
7 + 70 = 35 + 5 =
66 - 6 =
人们把12345679叫做“缺8数”。
83 - 3 =
43 - 3 = 4 + 60 =
90 + 9 = 3 + 40 = 50 - 40 =
97 - 7 = 80 - 60 = 50
+ 5 =
93
○
90-3 80
○
85-3
100
○
90 + 9
78-8
○
80
42 + 8○49 20 + 6
○
30
5 +
50
○
100 69-9
○
70
53-3
○
50
20
○
22-2 3 + 70
○
37
99
○
99-9
( )里最大能填几?
10 +
5 > ( ) 20 + ( )<28 69 + ( )
>60
50-( )<41 23 + 9>( )
81 + ( ) <85
88-( )>79 90 + (
)<100 45-( ) >20
数学小知识
最早使用小圆点作为小数点的是德国的数学家,叫克拉维斯。
五、认识人民币
认识人民币
20分 =( )角
7角 =( )分
60角 =( )元
1元 =( )分
40角 =( )元
1元 =( )角
5角4分 =( )分 65角
=( )元( )角
9角 =( )分
3元6角 =( )角
23分 =( )角( )分
70角 =( )元
1元 =( )角 3元4角
=( )角
2元3角 =( )角 4元5角(
)角
1角 =( )分 75角
=()元( )角
3角5分 =( )分
84角 =( )元( )角
86.00元 =( )元( )角
15.90元 =( )元( )角
0.05元 =( )分
12.50元 =( )元( )角
0.25元 =( )角( )分
1.50元 =( )元( )角
54.32元 =( )元( )角( )分
100.55元 =( )元( )角( )分
五、认识人民币
简单的计算(1)
9分 - 4分 = ( )分 8角 - 3角
=( )角
20元 - 10元 =( )元 1角5分 -
5分 = ( )角
1角3分 - 5分 =( )分 1元—5角
=( )角
1元2角+2元 =( )元( )角 4角+9角 =( )角
6元4角 + 3元6角 = 7元5角-2元2角 =
6元3角-1元1角 = 4元1角-1元 =
8元2角-1元4角 = 3元5角 + 1元5角 =
8元-2元5角 = 13元-1元9角 =
6元8角-2元8角 = 7元-3元4角 =
5元6角-2元 = 3元9角-1元7角 =
5元1角-1元1角 = 9元3角-7角 =
8元2角-4元2角 = 6元8角-8角 =
3元4角-2元9角 = 6元3角+ 5元7角 =
数学小知识
传说早在四千五百年前,我们的祖先就用刻漏来计时。
五、认识人民币
简单的计算(2)
0.09元 = ( )分
7元8角6分 = ( )元
1.06元 = ( )元( )分
4角3分 = ( )元
1元 =( )角 3元4角
=( )角
2元3角 =( )角 4元5角(
)角
1角 =( )分 75角
=()元( )角
3角5分 =( )分 84角 =(
)元( )角
6元3角 + 2元7角=
7元3角-3元=
6元4角-3元9角=
7元5角-2元8角=
6元9角-1元5角=
4元8角-1元3角=
8元2角-1元2角=
3元9角-1元9角=
一张100元能换( )张50元和(
)张10元;
一张100元能换( )张50元,或者( )张10元;
一张1元能换( )张5角和( )张1角;
五、认识人民币
单元测试
2元 =( )角
39分 =( )角( )分
4元2角 =( )角
30分 =( )角
78角 =( )元( )角 100分 =
( )元
2.40元 =( )元( )分 19.00元=( )元
35.50元=( )元( )角( )分
8元-2元5角=
13元-1元9角=
6元8角-2元8角= 7元-3元4角=
5元6角-2元= 3元8角-1元7角 =
4元4角 + 3元6角 = 10元 – 5元5角 =
5元
+ 6元5角 = 7元3角 + 2元7角 =
9角
○
1元 2元
○
1元5角
9元
○
100分
4元5角
○
5元
10角
○
1元 2.70元
○
30角
5元
○
50角 20分
○
3角
45角
○
31元
六、100以内的加法和减法
整十数加、减整十数(1)
0 + 70 = 60
+ 0 = 10 + 90 =
60 + 40 =
30 + 60 = 80 - 20 =
60 +
10 = 40 + 30 = 40 + 50 =
50 + 40 = 70 - 30 =
40 - 40 =
40 + 30 = 30 +
40 = 60 - 30 =
10 + 20 =
10 + 20 = 20 + 40 =
30 +
40 = 20 - 10 = 20 + 80 =
30 - 10 = 80 + 10 =
40 + 50 =
10 + 80 = 20 +
70 = 20 + 80 =
70 - 20
= 50 + 30 = 30 + 50 =
20 + 50 = 20 + 40 = 40 - 30 =
70 + 20 = 40 + 50 =
40 + 40 =
60 - 30 = 10 +
80 = 10 + 90 =
40 + 50 =
50 + 50 = 100
20 + 40 =
90 – 10 = 100
六、100以内的加法和减法
整十数加、减整十数(2)
– 20 =
– 30
=
20 + 60 =
40 + 40 =
80 + 20 =
30 + 60 =
20 + 50 =
30
+ 40 + 20 =
70–50 + 40 =
100–30 + 20 =
10 + 80–40 =
20 + 20 + 60 =
30 + 10
+ 40 =
90–20–60 =
80–20–10 =
( ) +
50 = 90
60 – 30 =
40 – 20 =
80 – 20 =
70 – 60 =
50 – 40 =
100–90 + 80 =
90–70–20 =
10 + 60 + 20 =
90–20–40 =
90–80 + 20 =
10–0 + 50 =
50–30 + 50
=
100–80 + 80 =
90 – 10 =
70 –
40 =
80 – 30 =
60 – 20 =
20 + 30 =
50 + 30–40 =
50 + 40–60 =
90–70 + 20
=
80–60 + 50 =
60–50 + 70 =
40 + 30
+ 30 =
90–10–20 =
100–50–10 =
80 –(
) = 50
( )+ 70 = 90
( ) + 30 =50
90 + ( ) = 100
20 + ( ) = 40
六、100以内的加法和减法
两位数加一位数(不进位)和整十数(1)
21 + 5 = 34 + 4 = 44 + 4 =
43 + 5 = 23 + 5 =
4 + 23 =
33 + 6 =
42 + 5 = 25 + 3 =
22
+ 3 = 34 + 5 = 6 + 31 =
37 + 2 = 55 + 4 = 62 + 4 =
24 + 4 = 32 + 3 =
5 + 34 =
25 + 4 = 64 + 2
= 27 + 2 =
54 + 4 =
53 + 3 = 7 + 21 =
41 + 5
= 22 + 7 = 85 + 3 =
56 + 3 = 22 + 6 = 3 + 46 =
45 + 4 = 66 + 2 =
23 + 4 =
75 + 4 = 43
+ 6 = 7 + 12 =
23 + 3 =
93 + 6 = 72 + 5 =
32 +
7 = 42 + 6 = 4 + 34 =
六、100以内的加法和减法
两位数加一位数(不进位)和整十数(2)
21 + 50 = 34 + 40 =
44 + 40 =
43 + 50 = 23 + 50 =
33 + 60 =
42 + 50 = 25 + 30 =
22 + 30 =
34 + 50 =
37 + 20 = 55 + 40 =
52 + 40 =
24 + 40 = 32 + 30 =
25 + 40 =
64 + 20 = 27 + 20 =
54 + 40
= 53 + 30 = 41 + 50 =
22 + 70 = 85 + 10 =
56 + 30 =
22 + 60 = 45 + 40 =
66 + 20 =
23 + 40 = 75 + 20 =
43 + 50 =
22 + 2 = 25 + 4 =
52 + 7 =
52 + 5 = 32 +
5 = 5 + 32 =
26 + 3 =
33 + 5 = 24 + 5 =
六、100以内的加法和减法
两位数加一位数(进位)(1)
29 + 7 =
46 + 8 =
想:先算(
)得( ), 想:先算( )得(
再算( )得(
); 再算( )得(
),
);
19 + 8 = 29 + 7 =
7 + 38 =
62 + 8 = 75 + 5 =
23 + 7 =
61 + 9 = 85 +
4 = 91 + 8 =
23 + 7 =
37 + 4 = 78 + 3 =
9 +
25 = 85 + 6 = 92 + 4 =
2 + 38 = 56 + 8 = 36 + 5 =
23 + 8 = 46 + 6 = 90 + 9 =
39 + 2 = 27 + 4 = 50
+ 5 =
10 + 40 = 61 + 10
= 18 + 5 =
六、100以内的加法和减法
两位数加一位数(进位)(2)
9 + 75 =
46 + 8 =
想:先算(
)得( ), 想:先算( )得( ),
再算(
)得( ); 再算( )得( );
34 +
9 = 10 + 60 = 9 + 50 =
74 + 6 = 37 + 2 = 26 + 5
=
26 + 8 = 19 + 6
= 28 + 5 =
23 + 8 =
89 + 6 = 75 + 5 =
26 + 9 =
25 + 6 = 50 + 37 =
61 + 9
= 85 + 4 = 91 + 8 =
73 + 7 = 37 + 4 = 78
+ 3 =
9 + 25 = 35 + 6 =
2 + 40 =
16 + 9 = 5 + 18
= 17 + 3 =
六、100以内的加法和减法
两位数减一位数(不退位)和整十数(1)
47 – 5 =
62 – 60 =
想:先算( )得(
), 想:先算( )得( ),
再算( )得( );
再算( )得( );
89 – 6 =
35 – 20 =
想:先算( )得( ), 想:先算( )得( ),
再算( )得( ); 再算( )得( );
55 - 2 = 45 - 20 = 66
- 20 =
98 - 60 = 56 - 3 =
69 - 40 =
六、100以内的加法和减法
两位数减一位数(不退位)和整十数(2)
55 - 20 =
45 - 20 = 66 - 20 =
98 - 60 =
56 - 30 = 69 - 40 =
77 - 50 =
88 - 40 = 79 - 50 =
68 - 40 =
76 - 40 = 88 - 50 =
89 - 50 =
56 - 40 = 99 - 40 =
97 - 30 =
89 - 30 = 77 - 50 =
25 -
2 = 45 - 2 = 26 - 2 =
77 - 5 = 88 - 4 =
79 - 5 =
68 - 4 = 76 -
4 = 28 - 5 =
89 - 5 =
36 - 4 = 29 - 4 =
27 - 3 =
89 - 3 = 47 - 5 =
48
51
- 5 = - 20 =
六、100以内的加法和减法
两位数减一位数(退位)(1)
27 – 5 =
56 – 9 =
想:先算(17 - 5 )得(
8 ), 想:先算( 10 - 9 )得( 1 ),
再算( 20 + 8 )得(
28 ); 再算( 46 + 1 )得( 47 );
53
– 6 = 61 – 4 =
想:先算( )得( ), 想:先算( )得(
),
再算( )得( ); 再算( )得(
);
81 - 7 = 36 - 7 = 31 -
7 =
10 - 3 = 34 - 5 =
55 - 8 =
六、100以内的加法和减法
两位数减一位数(退位)(2)
15 - 9 = 12 - 4 =
55 - 9 =
25 - 6 = 20 - 6 =
62 - 9 =
92 - 7 = 74 - 9 =
23 - 6 =
10 - 5 = 92 - 5 =
10 - 8 =
31 - 5 = 12 - 4 =
92 - 5 =
65 - 8 = 50 - 4 =
16 - 8 =
12 - 6 = 75 - 7 =
15 - 6 =
82 - 5 = 93 - 9 =
45 - 7 =
85 - 9 = 92 - 8 =
31 - 6 =
62 - 5 = 45 - 9 =
10 - 6 =
82 - 5 = 95 - 8 =
23 - 4 =
91
51
60
70
35
- 8
= - 6 =
88
27
六、100以内的加法和减法
32
两位数减一位数(退位)(3)
85 - 9 =
92 - 8 = 31 - 6 =
62 - 5 = 45 - 9 =
10 - 6 =
82 - 5 = 95 - 8 =
23 - 4 =
50 - 3 = 43 - 4 =
70 - 5 =
31 - 7 = 51 - 2 =
82 - 3 =
92 - 5 = 25 - 9 =
44 - 6 =
73 - 8 = 90 - 6 =
76 - 7 =
32 - 9 = 10 - 7 =
33 - 5 =
70 - 2 = 12 - 7 =
46 - 8 =
45 - 6 = 41 - 7 =
23 - 9 =
90 - 7 = 10 - 4 =
72 - 6 =
21 - 5 = 23 - 5 =
81 - 2 =
47 - 8 = 27 - 8 =
63 - 4 =
82 - 3 = 44 -
8 = 43 - 5 =
96 - 9 =
71 - 3 = 52 - 4 =
20
-4 = 46
六、100以内的加法和减法
23 + 8 = 89 + 6 =
21 – 9 = 15 + 30 = 63
26 + 9 = 25 + 6 =
61 + 9
= 85 + 4 =
– 9 = 36
-8 =
小括号(1)
– 60 =
75
+ 5 =
50 + 37 =
91 + 8 =
33 + 20 =
20 + 32 = 9 – 3 – 5 =
37 + 4 +
40 + 40 = 78 – 8 – 60 =
48 + 6 =
37 + 5 = 47 – 7 - 40 =
6 + 65 =
36 – 8 = 9 + 6 – 3 =
54 + 6 =
83 – 9 = 9 + (6 – 3)=
30 + 40 =
62 - 7 = 18 + (2 + 7) =
40 + 26 =
32 - 4 = 18 + 2 + 7 =
30 + 34 =
66 - 50 = 16 - (9 - 3) =
数学小知识
运算顺序
一个算式中有小括号,运算顺序是先算小括号中的算式,如
(3 + 4)中,应先算括号中的3 + 4 得7,再算10 – 7 得10 -
3;
‘
一个算式是连加、连减或加减混合,如果没有小括号,运算
顺序是“从左往右”,如10 – 3 + 4 中,应先算10 – 3 得7,
再算7 +
4 得11;
六、100以内的加法和减法
小括号(2)
23 + 7 =
47 + 4 = 88 + 3 =
26 + 8 =
19 + 6 = 28 + 5 =
57 -8 =
44 + 9 = 100 – 60 =
42 + 20 =
97 - 70 = 16 - 9 - 3 =
28 + 9 =
79 - 20 = 12 - (4 - 4) =
48 + 30 =
76 - 50 = 12 - (4 + 4) =
40 + 50 =
75 - 40 = 12 - 4 - 4 =
6
+ 77 = 84 - 60 = 13 + 7 - 5 =
35 + 5 = 70 - 50 = 13 + (7 -
5) =
29 + 40 = 35 - 9 = 100
- (60 - 20) =
49 + 9 = 24 - 8 =
100 - (60 - 20) =
45 + 8 = 30 + 20
= 100 + (36 + 4) =
100 - 40 =
55 + 8 = 100 -(36 + 4) =
5 + 50 =
38 + 4 = 31 + (8 + 12) =
16 + 80 =
76 + 20 = 31 + 8 + 12 =
83 + 8 =
26 + 5 = 84-(9-3) =
六、100以内的加法和减法
用连加解决问题
77 - 5 =
88 - 4 = 3 + 3 + 3 =
79 + 5 =
68 - 4 = 2 + 2 + 2 =
76 - 4 =
28 - 5 = 45 – 30 + 8 =
9 + 39 =
16 + 30 = 31 -(26 – 6)=
89 - 5 =
36 - 4 = 6 + 6 + 6 =
29 - 4 =
27 - 3 = 9 + 9 + 9 =
89 - 3 =
47 - 5 = 24 - (12 + 8 )=
45 - 6 =
41 - 7 = 43 + (38 – 30)=
23 - 9 = 21 - 5 = 8 + 8 +
8 =
23 + 5 = 81 - 2 =
7 + 7 + 7 =
40 – 7 = 45 + 9 =
20 + 20 + 20 =
45 + 30 = 32 + 60 =
30 + 30 + 30 =
12
+6
(
)
+6
( )
+6
( )
+6
(
25
+5
( )
+5
(
)
+5
( )
+5
(
六、100以内的加法和减法
用连减解决问题
14 – 6 = 26 – 7 =
14 – 6 – 6 =
50 + 50 = 48 + 30 =
36 – 8 – 8 =
87 – 70 = 14 – 7 =
28 – (35 – 30)=
6 + 60 = 48 – 9
= 10 – 3 – 3 =
47 – 40 =
76 – 4 = 27 – 4 – 4 =
47 – 6 =
44 + 30 = 17 + 9 – 5 =
9 + 57 =
66 + 5 = 33 + (12 – 5)=
75 + 5 =
23 + 7 = 90 - 86 + 20 =
26 + 8 =
19 + 60 = 5 + 46 + 20 =
32 + 8 =
16 + 9 = 3 + 47 - 20 =
)
)
40
17
31
-8
-4
-7
( )
( )
(
)
-8
-4
( )
( )
(
)
-8
-4
-7
( )
( )
(
)
-8
-4
-7
( )
( )
-7
( )
45
-5
(
)
-5
( )
-5
( )
-5
(
六、100以内的加法和减法
综合练习 (1)
26 + 8
= 95 - 30 = 27 + 6 + 8 =
80
- 30 = 89 - 7 = 47 - 6 + 40 =
62 + 7 = 50 + 26 = 70 + 18 -
60 =
46 + 7 = 41 - 2 = 81 -
7 - 30 =
29 + 30 = 71 - 8 =
53 - 8 - 30 =
53 - 6 = 79 + 2 =
40 +(37 – 9) =
9 + 27 = 67 - 20 =
(46 – 7)+ 20 =
20 + 39 = 49 – 5 =
30 + 39 + 5 =
92 - 5 = 25 - 9 =
44 - 6 =
73 - 8 = 90 - 6
= 76 - 7 =
45 + 4
○
50
82 - 9
○
61 53 + 9
○
61
4 + 56
○
96 86 - 60
○
26
93 - 7
○
23
)
68 + 8
○
75 52 - 9
○
43
25 + 7
○
95
64 + 2
○
84
47 - 4
○
33 76 - 6
○
66
47 + 4
○
51 80 - 30
○
76
30 + 50
○
80
六、100以内的加法和减法
综合练习 (2)
23 + 7 = 47 + 4 =
26
+ 8 = 19 + 6 =
23 + 8 =
89 + 6 =
26 + 9 = 25 +
6 =
61 + 9 = 85 + 4 =
52 - 4 = 73 - 6 = 81
- 5 =
50 - 3 = 43 - 4 =
70 - 5 =
31 - 7 = 51 - 2 =
82 - 3 =
32 - 9 = 10 - 7 =
33 - 5 =
70 - 2 = 12 - 7 =
46 - 8 =
38 - 30 = 100 – 50 =
33
68 – 1 = 84 – 20 =
3 + 3 + 3 + 3 =
10 + 40 =
61 + 10 = 0 + 95 - 80 =
74 + 6 =
37 + 2 = 60 - 50 + 24 =
26 + 5 =
23 + 7 = 7 + 56 - 50 =
47 + 4 =
8 + 5 = 90 - 87 + 50 =
88 + 3 =
28 + 5 =
75 + 5 =
50 + 37
=
– 4 + 40 =
91 + 8 =
六、100以内的加法和减法
单元测验
88 + 3 =
47 + 6 = 8 + 68 + 30 =
39 + 8 =
26 + 8 = 25 + 25 + 50 =
19 + 6 =
28 + 5 = 9 + 41- 30 =
53 + 6 =
78 + 5 = 60
37 + 9 = 86 + 6 =
11 + 49 - 50 =
23 + 8 = 89 + 6 =
35 - 35 + 40 =
75 + 5 = 68 + 7 =
70 - 60 + 25 =
6 + 18 =
40 + 6 = 5 + 45 - 30 =
35 + 30 =
32 + 8 = 85 - 20 - 54 =
25 + 5 =
16 + 9 = 40 - 35 + 30 =
13 + 7 =
86 + 8 = 25 - 20 + 55 =
19 + 60 =
54 + 9 = 8 +
34 + 6 = 5 + 37 =
64 -
14 + 7 = 37 + 9 =
57 +
8 = 70 + 60 =
39 + 2 =
27 + 4 = 90 - 86 + 20 =
50 + 5 =
32 + 8 = 5 + 46 + 20 =
七、找规律
找规律(1)
– 23 - 20 =
(43 – 40) =
(34 - 30) =
26 + 20)- 9 =
33 - 30) + 7 =
(
(
67 + 9 = 22 -
5 = 35 + 5 =
91 - 8 =
68 + 20 = 73 + 5 =
43 - 5
= 24 + 7 = 45 + 5 =
53 - 6 = 75 + 6 = 39 + 50
=
10 + 40 = 6 + 10 =
18 + 50 =
74 + 6 = 88 + 3
= 23 + 7 =
37 + 4 =
78 + 3 = 27 + 6 =
39 + 8 =
68 + 5 = 3 + 47 - 20 =
9 + 25 =
85 + 6 = 73 - 40 + 8 =
按图形的排列规律接着画。
(
1
)
♀♂♀♂♀♂
(
2
)
○○◇○○◇○○◇
(
3
)
□□○○○□□○○○□□
七、找规律
找规律(2)
24 + 6 = 5
+ 37 = 44 + 7 =
55 - 17 =
24 + 6 = 68 - 5 =
33 - 6 =
57 - 7 = 25 - 8 =
85 + 4
= 91 + 8 = 82 + 5 =
39 - 1 = 46 + 7 = 92 + 4 =
73 + 14 = 55 - 27 = (49 + 30)
- 6 =
27 + 9 = 43 - 8 = 6 +
53 + 30 =
50 + 8 = 61 + 9 =
67 - 37 + 20 =
按规律填数
(1)1,3,5,(
),9
(2)1,4,7,10,13,( ) ,19
(3)1,1,2,3,5,8,13,( ) ,34
(4)2,4,8,(
),32,64
(5)1,4,9,16,( )
(6)5,7,5,9,5,11,5,( ),( )
(7)3,6,9,( ),( ),18
(8)3,1,6,4,9,9,12,16,( ),( )
期末复习(1)
75 - 2 = 75 +
14 = 69 + 27 =
90 - 38 =
42 + 20 = 40 + 10 =
26 + 39 =
22 - 6 = 93 - 60 =
39 - 2 =
47 - 30 = 44 + 3 =
75 + 5 =
30 + 62 = 72 – 30 =
0 + 30 = 86 - 9 = 53 - 6 =
33 + 9 = 4 + 67 = 30 - 7 =
60 - 3 = 95 - 90 = 34 + 8 =
25 + 8 = 44 - 20 = 96 + 6 =
47 + 5 = 26 + 5 = 100 + 0
=
100 – 40 = 38 + 4 =
90
90 – 9 = 35
50 + 15 =
20 + 45 = 44 - 8 =
90 - 40 =
80 - 30 = 50 - 1 =
30 - 12 =
34 + 9 = 15 + 30 =
期末复习(2)
62 + 10 = 47
54 + 4 =
98
4 + 76 = 68
73-6 =
70
34-10 = 48
53-20 = 30 +
37 = 100 - 20 - 40 =
90-4 =
55 + 9 = 90 - 50 - 20 =
–7 =
33 + 20 =
-5 = 18 + 7 - 9 =
-40 = 15 + 4 + 6 =
-10 =
17 + 6 - 5 =
-3 = 47 - 8 - 3 =
-9 = 80 - 20 + 30 =
– 3 =
80-7 = 90-9 =
87 - 10 - 50 =
50 + 32 = 27 + 50 =
86 - 7 - 50 =
38 + 30 = 6 + 25 =
98 - 9 - 70 =
50 + 33 = 68 + 20 =
79 - 8 - 40 =
27 + 46 = 93
45-8 =
70
28 + 10 = 30 + 37 = 3 + 5 +
34 =
3 + 37 = 84
20 + 73 =
4 + 48 = 76 - 7 + 20 =
期末复习(2)
5
+ 89 = 28 + 40 = (30 + 37) - 5 =
84-3 = 73 + 8 = 44
78-6 =
76
77-8 = 29 + 8 = 15 - 7 + 4 =
2 + 16 = 10 + 76 = 48 - 8 + 5 =
45 + 7 = 45
35 + 7 =
12 + 8 = 24 + 20 + 9 =
14 + 6 =
14
15 + 6 = 18 + 10 = 15 + 8 + 70
=
-76 = 43 + 7 + 43 =
-30 =
5 + 22 + 8 =
-5 = 48 - 9 + 40 =
-7 = 94 - 9 - 60 =
-3 =
8 + (33
-9 = 42 - 4 - 20 =
– (8 +
2) =
–5) =
17 + 9 =
50 – 3 = 6 + 39 - 5 =
60 – 3 = 30
+ 1 6= 15 - 8 + 4 =
35 + 16 = 42
+ 38 = 48 - 9 + 8 =
50 - 21 = 35
- 30 = 63 + 7 + 6 =
28 + 8 = 36
+ 20 = 42 - 4 - 10 =
37 + 7 = 57
- 8 = 20 + 25 + 9 =