五年级数学下册脱式计算及答案
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五年级数学下册脱式计算及答案
脱式计算
8
3200÷
10
2
80÷
5
2
【答案】
3200÷
8
80÷
5
5
=80×
2
=3200×
=4000
10
10
8
=200
解方程
3
5
÷X=5 X × =
3
2 5
6
2
3
X ÷ =
7 7
20 5
5 20
【答案】
解:X= ÷5
X=
3
解:X= ÷
X=
6
5
4
5
解:X= ×
7 7
100
X=
49
5
3
25
脱式计算
0.6×0.6×6
=0.36×6
=2.16
(5.2×2+5.2×1.5+2×1.5)×2
=(10.4+7.8+3)×2
=21.2×2
=42.4
下列各小数化成分数,分数化成小数
(除不尽的保留三位小数)
1
0.65 ② 4.4
1
③
2
3
【答案】
①0.65=
65 13
100 20
4
2
4
② 4.4 =
4
10 5
1
2
③
= 2+1÷3 ≈ 2.333
3
脱式计算
(5+4+3)×4÷12
=12×4÷12,
=4
(20×10+20×5+10×5)×2﹣5×5×2
=(200+100+50)×2﹣50
=350×2﹣50
=700﹣50
=650
40×25×(12.8﹣12)
=1000×0.8
=800
脱式计算
12×
3
=
7
×32 =
4
÷
1
5
8 8
=
6
3
÷
3
3 2
6
÷
3
=
2 4
=
4
×
3
=
7 14
【答案】
9 7
80
10
2
1
3 7
4 13
2
脱式计算
3
4 4 16
16
×
9 9
÷
15
【答案】
1
5
7
12
12
60
脱式计算无答案练习
5
3
4
1
7 7
6
3 5
8
8
5
÷
7
=
3 1
9 18 4
+
5
=
12÷
12
=
1
13 2
-
1
3
=
19
20
1
6
14
5
÷24
5
(
5
7
)
9 6 12
6.9+4.8+3.1 0.456+6.22+3.78 15.89+(6.75-5.89)
4.02+5.4+0.98
3.68+7.56-2.68
3.82+2.9+0.18+9.1
5.27 + 2.86 - 0.66 +
1.63
47.8-7.45+8.8
66.86-8.66-1.34
5.17-1.8-3.2
7.85 + 2.34 - 0.85 +
4.66
9.6+4.8-3.6
13.35-4.68+2.65
0.398+0.36+3.64
0.25×16.2×4
13.75-(3.75+6.48)
35.6-1.8-15.6-7.2
7.14-0.53-2.47
73.8-1.64-13.8-5.36
15.75+3.59-0.59+14.25
(1.25-0.125)×8