一年级(下册)口算20以内加减法
海洋生物学-雷锋的事迹
.
一年级下册
20以内的退位减法：
（1）退位减法
11-1= 11-9=
13-5= 11-10=
11-2= 12-1=
19-14= 12-2=
11-3= 20-7=
14-1= 12-3=
11-5= 12-5=
20-15= 12-6=
11-6= 12-7=
17-5= 12-9=
20-8= 18-3=
11-7= 12-10=
. . .
13-8=
13-9=
19-7=
13-10=
13-11=
19-18=
13-12=
13-13=
20-10=
14-0=
14-1=
14-2=
18-7=
14-12=
20-14= 14-13=
14-3= 14-14=
14-4= 15-0=
18-4= 16-0=
13-6= 15-1=
14-5= 18-12=
14-7= 15-2=
16-2= 15-3=
14-8= 13-4=
14-9= 15-4=
14-10= 15-6=
12-11=
13-0=
11-4=
11-0=
12-0=
13-1=
17-6=
13-2=
11-8=
13-3=
17-7=
13-7=
15-7=
18-1=
15-8=
14-6=
15-9=
19-16=
15-11=
18-10=
15-12=
15-13=
15-14=
18-11=
15-15=
16-10=
19-13= 16-11=
16-1= 18-8=
16-3=
16-12=
20-2= 20-11=
16-4= 16-13=
16-5=
16-14=
16-6= 16-15=
20-5= 16-16=
16-7=
17-0=
16-8= 19-12=
16-9= 17-1=
（2）连减、加减混合
2+14-1= 20-0-1=
20-0-0=
20-0-2=
20-4-0= 1+18-10=
. . .
17-2=
17-3=
18-15=
17-4=
17-8=
17-9=
20-1=
17-10=
20-6=
17-11=
17-12=
17-13=
20-0-3=
20-0-4=
20-3-15=
.
17-14=
17-15=
17-16=
17-17=
18-0=
18-2=
18-5=
18-6=
19-11=
18-9=
18-13=
18-14=
1+17-1=
20-0-5=
20-0-6=
19-17=
18-16=
20-4=
18-17=
18-18=
19-0=
19-1=
19-2=
19-3=
19-4=
20-13=
19-5=
20-0-7=
20-0-8=
20-0-9=
20-16=
19-6=
19-8=
19-9=
19-10=
12-8=
19-15=
19-19=
20-0=
20-3=
20-9=
20-12=
20-0-10=
20-0-11=
20-0-12=
20-17=
15-10=
20-18=
12-4=
20-19=
20-20=
20-0-13=
20-0-14=
20-0-15=
20-0-16=
20-0-17=
20-0-18=
20-0-19=
20-0-20=
20-1-0=
1+18-4=
20-1-1=
20-1-2=
20-1-3=
20-1-4=
20-1-5=
20-1-6=
20-1-7=
20-1-8=
1+16-14=
20-1-9=
20-1-10=
20-1-11=
20-1-13=
20-1-12=
20-1-14=
20-1-15=
20-1-16=
20-1-17=
20-1-18=
20-1-19=
20-2-0=
20-2-1=
19-6-5=
20-2-2=
20-2-3=
1+18-11=
20-2-4=
. . .
20-2-5=
20-2-7=
1+16-14=
20-2-8=
20-2-9=
20-2-10=
1+17-2=
20-2-12=
20-2-13=
20-2-14=
20-2-16=
19-1-0=
20-2-17=
20-2-18=
20-3-0=
20-3-1=
20-3-2=
.
20-3-3=
20-3-4=
20-3-5=
20-3-6=
20-3-7=
20-3-8=
20-3-9=
20-3-10=
20-3-11=
1+17-3=
20-3-12=
20-3-13=
20-3-14=
1+17-5=
20-3-16=
10-3-17=
1+18-15=
20-4-1=
20-4-2=
20-4-3=
1+17-4=
20-4-5=
20-4-6=
20-4-7=
20-4=8=
20-4-9=
20-4-10=
20-4-11=
20-4-12=
20-4-13=
1+18-12=
20-4-14=
20-4-15=
19-4-7=
20-2-6=
20-4-16=
20-5-0=
20-5-1=
1+16-13=
1+17-6=
20-5-2=
20-5-3=
20-5-4=
1+18-14=
20-5-5=
20-5-6=
20-5-7=
1+19-1=
20-5-8=
20-5-9=
20-5-10=
20-5-11=
20-5-12=
20-5-13=
20-5-14=
20-5-15=
1+16-15=
20-6-0=
20-6-1=
20-9-8=
1+18-16=
20-6-2=
20-6-3=
20-6-4=
1+19-2=
20-6-7=
20-6-8=
20-6-9=
1+18-17=
20-6-10=
20-6-11=
20-6-12=
20-6-13=
20-6-14=
20-7-0=
20-7-1=
20-7-2=
20-7-3=
20-7-4=
20-7-5=
20-9-9=
1+18-18=
20-7-6=
20-7-7=
20-7-8=
20-7-9=
1+18-9=
20-7-10=
20-7-11=
20-7-12=
20-7-13=
1+17-0=
20-8-0=
20-8-1=
20-8-3=
20-8-4=
1+18-19=
20-8-5=
20-8-6=
20-8-7=
1+19-0=
20-8-9=
. . .
20-8-8=
20-8-10=
20-8-11=
20-8-12=
20-9-0=
1+18-13=
20-9-1=
20-9-2=
20-9-3=
20-9-4=
20-9-5=
20-9-7=
20-9-10=
20-9-11=
1+19-3=
20-10-0=
20-10-1=
.
20-10-2=
1+16-16=
20-10-3=
20-10-4=
19-5-12=
20-10-5=
20-10-6=
20-10-10=
20-11-0=
19-0-4=
20-11-1=
20-11-2=
20-11-3=
20-11-4=
19-1-1=
20-11-5=
20-11-6=
20-11-7=
2+13-10=
20-11-8=
20-11-9=
20-12-0=
2+14-5=
20-12-1=
20-12-2=
20-12-3=
20-12-4=
20-12-5=
20-12-6=
2+13-13=
20-12-7=
20-12-8=
2+14-6=
20-13-0=
19-1-17=
20-13-1=
20-13-1=
2+14-10=
20-13-2=
20-15-1=
20-15-2=
2+13-11=
20-15-3=
19-0-5=
20-15-4=
2+13-4=
2+14-0=
20-16-0=
20-16-1=
20-16-3=
2+14-4=
20-16-4=
20-17-0=
20-17-1=
20-17-2=
20-17-3=
20-18-0=
20-18-1=
20-18-2=
20-19-0=
20-19-1=
19-0-0=
1+13-5=
19-0-1=
19-0-2=
19-0-3=
19-0-6=
2+13-5=
19-0-7=
19-0-8=
19-0-10=
19-0-11=
2+14-8=
19-0-12=
19-0-13=
19-0-14=
19-0-15=
19-0-17=
1+11-9=
19-0-18=
1+14-8=
19-0-19=
19-1-2=
19-1-3=
19-1-4=
19-1-5=
19-1-6=
19-1-7=
19-1-8=
1+14-14=
19-1-10=
19-1-11=
1+14-12=
19-1-12=
19-1-13=
19-1-14=
19-1-15=
2+14-3=
2+14-7=
2+14-11=
19-1-16=
19-1-18=
. . .
19-2-0=
19-2-1=
19-2-2=
19-2-3=
19-2-4=
19-2-9=
19-2-10=
1+14-9=
19-2-11=
19-2-12=
1+14-10=
19-2-13=
19-2-14=
1+14-13=
19-2-15=
19-2-16=
20-2-11=
.
19-2-17=
19-3-0=
19-3-2=
19-3-3=
19-3-4=
19-3=5=
19-3-6=
19-3-7=
10-3-8=
19-3-9=
19-3=10=
20-15-5=
19-3-11=
19-3-12=
19-3-13=
19-3-14=
19-3-15=
19-3-16=
1+14-7=
1+14-15=
19-4-0=
19-4-1=
19-4-1=
19-4-2=
19-4-3=
19-4=4=
19-4-5=
20-16-2=
19-4-6=
19-4-8=
19-4-9=
19-4-10=
19-4-11=
19-4-12=
19-4-13=
19-4-14=
19-4-15=
19-5-0=
19-5-1=
19-5-2=
19-5-3=
19-5-4=
2+13-14=
19-5-5=
19-5-6=
19-5-7=
19-5-8=
2+13-12=
19-5-9=
19-5-10=
19-5-11=
19-5=13=
19-5-14=
19-6=0=
19-6-1=
19-6-2=
19-6-3=
19-6-4=
19-6-7=
19-6-8=
19-6-9=
19-6-10=
1+18-2=
1+18-3=
1+18-5=
1+18-6=
19-6=11=
19-6-12=
19-6-13=
19-7-0=
19-7-1=
19-7-2=
19-7-3=
19-7-4=
2+14-9=
19-8-10=
19-8-11=
19-10-0=
19-10-1=
19-10-2=
19-10-3=
20-10-7=
20-10-8=
20-10-9=
19-10-3=
19-10-8=
19-10-9=
2+18-17=
19-11-0=
19-11-1=
2+18-10=
19-11-2=
19-11-3=
19-11=4=
19-11-5=
2+18-14=
19-11-6=
2+18-13=
19-11-7=
19-11-8=
19-12-0=
2+18-16=
. . .
19-12-1=
1+17-14=
1+13-0=
1+13-1=
1+13-3=
1+13-6=
1+13-7=
19-12-3=
19-12-4=
19-12-5=
19-12-6=
19-12-7=
19-13-0=
19-13-1=
19-13-2=
19-13-4=
1+17-16=
.
19-13-5=
1+17-18=
19-13-6=
1+14-3=
19-14-0=
1+13-2=
19-14-1=
19-14-2=
1+17-12=
19-14-3=
1+15-16=
19-14-4=
19-14-5=
1+17-15=
19-15-0=
19-15-1=
2+18-9=
2+18-20=
3+8-0=
19-15-2=
19-15-3=
19-15-4=
19-16-0=
19-16-1=
19-16-2=
1+14-11=
19-16-3=
19-17-0=
19-17-2=
19-17-1=
1+14-2=
19-18-0=
19-18-1=
19-19-0=
2+18-19=
18-0-0=
1+14-4=
18-0-1=
18-0-2=
2+18-11=
18-0-3=
2+18-12=
18-0-4=
18-0-5=
18-0-6=
2+18-15=
18-0-9=
1+10-0=
1+10-1=
1+10-2=
19-7-5=
19-7-6=
1+13-10=
19-7-7=
19-7-8=
1+14-1=
19-7-9=
2+16-16=
2+16-17=
2+16-8=
2+17-3=
2+17-4=
19-7-10=
19-7-11=
1+13-13=
19-7-12=
1+13-4=
19-8-0=
19-8-1=
2+13-15=
19-8-2=
19-8-3=
19-8-9=
1+10-3=
1+10-4=
1+10-5=
3+9-1=
3+9-2=
3+9-3=
3+9-4=
3+9-5=
3+9-6=
3+9-7=
3+9-8=
3+9-9=
3+9-10=
3+9-11=
3+9-12=
1+10-6=
1+14-5=
1+10-7=
1+11-0=
1+11-3=
1+11-4=
1+11-5=
1+11-6=
1+11-7=
1+11-8=
1+11-10=
1+11-11=
1+11-12=
1+12-0=
. . .
19-8-5=
1+12-1=
1+12-2=
1+12-3=
20-2-15=
1+12-4=
1+12-5=
1+12-6=
19-9-8=
1+12-7=
1+12-8=
1+12-9=
1+12-10=
1+12-11=
1+12-12=
1+12-13=
1+13-8=
.
1+13-9=
1+13-11=
19-8-7=
1+13-12=
1+13-14=
1+14-0=
1+14-6=
1+15-0=
1+15-1=
1+15-2=
1+15-3=
1+15-4=
1+15-5=
1+15-6=
19-8-8=
1+15-7=
1+15-8=
1+15-9=
1+15-10=
2+17-0=
2+17-1=
2+17-2=
1+15-11=
1+15-12=
1+15-13=
1+15-14=
19-9-6=
1+15-15=
1+16-0=
19-9-5=
1+16-1=
1+16-2=
19-9-0=
1+16-3=
1+16-4=
1+16-5=
19-9-1=
1+16-6=
19-9-4=
1+16-7=
1+16-7=
19-8-6=
1+16-8=
1+16-9=
1+16-10=
1+16-11=
1+16-12=
1+17-7=
19-8-4=
1+17-8=
1+17-9=
1+17-10=
19-9-2=
1+17-11=
1+17-13=
1+17-17=
19-10-4=
19-10-5=
19-10-6=
19-10-7=
1+18-0=
1+18-1=
1+18-7=
19-9-3=
19-9-7=
19-9-10=
20-8-2=
1+19-4=
1+19-5=
1+19-6=
2+17-10=
2+17-11=
2+17-12=
2+17-14=
2+17-17=
1+17-18=
1+19-7=
1+19-8=
1+19-9=
1+19-10=
1+19-11=
1+19-12=
1+19-13=
1+19-14=
1+19-15=
1+19-17=
1+19-18=
1+19-19=
1+19-20=
2+9-0=
2+9-1=
2+9-2=
2+9-3=
2+9-4=
2+9-5=
2+9-6=
2+9-7=
2+9-8=
2+9-10=
2+9-11=
2+10-0=
2+10-1=
. . .
2+10-2=
2+10-3=
3+11-13=
3+11-14=
2+10-4=
2+10-5=
2+10-6=
2+10-7=
2+10-8=
2+10-9=
2+10-10=
2+10-11=
2+10-12=
2+11-0=
2+11-1=
2+11-2=
2+11-3=
.
2+11-4=
2+11-5=
2+11-6=
20-13-3=
2+17-11=
20-13-4=
20-13-5=
2+17-16=
20-14-0=
2+17-13=
20-14-2=
2+17-15=
20-14-5=
20-14-6=
2+13-3=
20-15-0=
2+11-7=
2+11-8=
2+11-9=
2+11-10=
2+11-12=
2+11-13=
2+12-0=
2+12-1=
2+12-2=
2+12-3=
2+12-4=
2+12-5=
2+12-6=
2+12-7=
2+12-8=
2+12-9=
2+13-1=
3+12-1=
3+12-2=
2+13-2=
2+13-7=
2+13-8=
2+13-9=
2+13-6=
2+14-12=
2+14-13=
2+14-14=
2+14-15=
2+14-16=
2+15-0=
2+15-1=
2+15-2=
2+15-3=
2+15-4=
2+15-5=
2+15-6=
2+15-7=
2+15-8=
2+15-9=
2+15-10=
2+15-11=
19-3-1=
2+15-12=
2+15-13=
2+15-14=
2+15-15=
2+15-16=
2+15-17=
2+16-0=
2+16-1=
2+16-2=
2+16-3=
2+16-4=
2+16-5=
19-2-5=
19-2-6=
19-2-7=
19-2-8=
2+16-6=
2+16-7=
2+16-8=
2+16-9=
2+16-10=
2+16-11=
2+16-13=
2+16-12=
1+10-8=
1+10-9=
1+10-10=
1+11-1=
1+11-2=
2+16-14=
2+16-15=
2+17-5=
2+17-6=
2+17-7=
2+17-8=
1+16-17=
2+17-9=
2+17-19=
2+18-0=
2+18-1=
2+18-2=
2+18-3=
2+18-4=
2+18-4=
. . .
2+18-5=
20-14-3=
2+18-6=
2+18-7=
2+18-8=
3+8-1=
3+8-2=
3+8-3=
3+8-4=
3+8-5=
3+8-6=
3+8-7=
20-14-1=
3+8-8=
3+8-9=
3+9-10=
3+8-11=
.
3+9-0=
3+10-0=
3+10-1=
3+10-2=
3+10-4=
3+10-3=
3+10-5=
20-13-6=
3+10-6=
3+10-7=
3+10-8=
3+10-9=
3+10-10=
3+10-10=
3+10-11=
3+10-12=
3+10-13=
20-13-7=
3+11-0=
3+11-1=
3+11-2=
3+11-3=
3+11-4=
3+11-5=
3+11-6=
3+11-7=
3+11-8=
3+11-9=
3+11-10=
3+11-11=
3+11-12=
3+12-0=
3+12-3=
3+12-4=
3+12-5=
3+12-6=
3+12-7=
3+12-8=
3+12-9=
3+12-10=
3+12-11=
3+12-12=
3+12-13=
3+12-14=
3+12-15=
.
2+18-18= 2+12-10=
2+12-11= 2+12-13=
2+12-14=
2+13-0=
. . .