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人教版五年级上册数学期中脱式计算专题训练
一、计算题
1．用简便方法计算。
18－3.35－5.65 2.78×0.02＋0.98×2.78 8.5×101
2．计算下列各题，能用简便方法的要用简便方法。
23.5×17.6－23.5×7.6 2.5×3.2×1.25
7.5+2.5×4 43.56×7.2＋7.2×57.44－7.2
3．脱式计算，能简算要简算。
8.4×0.6+9.4 32×1.25×0.25
3.75×10.2 3.9×8.2+1.8×3.9
4．用合适的方法计算下列各题。
0.5×1.6×12.5 23.5×4.6+2.35×54 18.9-7.5÷（0.44+1.06）
5． 脱式计算，能简算的要简算。
5.4＋4.6÷0.2 0.8×0.4×1.25×2.5 9.75÷1.5＋9.75÷2.5
8.9×10.1 3.6×6.5＋36×0.45－3.6
6．计算下面各题，怎样简便就怎样算。
8.52﹣（5.52+0.9） 4×（9.3﹣5.7）+3.6
7.5×101 （0.38+0.38+0.38+0.38）×2.5
7．计算下列各题，怎样算简便就怎样算。
32.4+2.5÷0.4 5.4×2.7+7.3×5.4
12.5×88 3.6÷[（8.1+1.9）×0.2]
8．下面各题，怎样算简便就怎样算
67.58-（17.58+4.32） 1.25×2.5×（4×0.8）
7.6×3.4+6.6×7.6 4.2÷[（5.92-4.52）×0.2]
9．计算下面各题，能简算的要简算。
8.9-0.46+11.1-0.54 1.25×3.2×0.25
13.28×9.6-3.28×9.6 5.94÷[0.2×(6-1.5)]
10．计算下面各题，怎样算简便就怎样算。
5.8+4.2×0.4 125.4-99+73.6 12.5×0.25×32
11．计算下列各题（能用简便计算的用简便计算）：
12．计算下面各题。
18÷20×3.75 1.45× （7.2÷2.4）
0.78+0.22÷5 （7.5-2.3×0.4）÷0.01
13．递等式计算。（能巧算的要巧算）
]
14．计算下面各题，能简算的要简算
3.4×6.6+3.4×3.4 12.83-（7.9+2.83）
9.4÷[（1.3+1.4）÷0.27] 3.7+6.3÷0.21×1.1
15．脱式计算。
16.9+1.05÷0.7 8.5×5.67-7.5×5.67 63÷(4.86+5.64)×0.4
16．脱式计算，怎么简便怎么算。
1.25×32 50.6÷0.25÷0.4 0.575×29+2.9×4.25
17．脱式计算。(能简算的要简算)
0.58×101 36.45×0.8÷2.7 (6.3+0.45)÷0.9
18．计算下列各题，要写出必要的计算过程。
0.6×15.8－6×0.58 12.5×[（23.5＋8.5）÷4]
19．脱式计算，能简算的要简算。
0.25×32×1.25 6.59×7.5+0.75×34.1 5.5×4.2÷0.7
20．计算下面各题，能简算的要简算。
35.7×101-35.7 7.4×18.2+7.4×0.8+7.4 （34.5+26.4）×2×5
答案解析部分
1．【答案】解：18-3.35-5.65
＝18－（3.35＋5.65）
＝18－9
＝9
2.78×0.02＋0.98×2.78
＝2.78×（0.02＋0.98）
＝2.78×1
＝2.78
8.5×101
＝8.5×100＋8.5×1
＝850＋8.5
＝858.5
2．【答案】解：23.5×17.6－23.5×7.6
=（17.6-7.6）×23.5
=10×23.5
=235
2.5×3.2×1.25
=（2.5×4）×（0.8×1.25）
=10×1
=10
7.5+2.5×4
=7.5＋10
=17.5
43.56×7.2＋7.2×57.44－7.2
=（43.56＋57.44-1）×7.2
=100×7.2
=720
3．【答案】8.4×0.6+9.4
=5.04+9.4
=14.44
32×1.25×0.25
=(8×1.25) ×(4×0.25)
=10×1
=10
3.75×10.2
=3.75×(10+0.2)
=37.5+0.75
=38.25
3.9×8.2+1.8×3.9
=3.9×(8.2+1.8)
=39
4．【答案】解：0.5×1.6×12.5
=（0.5×0.2）×（8×12.5）
=0.1×100
=10
23.5×4.6+2.35×54
=（4.6＋5.4）×23.5
=10×23.5
=235
18.9-7.5÷（0.44+1.06）
=18.9-7.5÷1.5
=18.9-5
=13.9
5．【答案】解：5.4＋4.6÷0.2
＝5.4＋23
＝28.4
0.8×0.4×1.25×2.5
＝（0.8×1.25）×（0.4×2.5）
＝1×1
＝1
9.75÷1.5＋9.75÷2.5
＝6.5＋3.9
＝10.4
8.9×10.1
＝8.9×（10＋0.1）
＝8.9×10＋8.9×0.1
＝89＋0.89
＝89.89
3.6×6.5＋36×0.45－3.6
＝3.6×6.5＋3.6×4.5－3.6×1
＝3.6×（6.5＋4.5－1）
＝3.6×10
＝36
6．【答案】解： 8.52-（5.52+0.9）
=8.52-5.52-0.9
=3-0.9
=2.1
4×（9.3-5.7）+3.6
=4×3.6＋3.6
=（4＋1）×3.6
=5×3.6
=18
7.5×101
=7.5×100＋7.5×1
=750＋7.5
=757.5
（0.38+0.38+0.38+0.38）×2.5
=0.38×（4×2.5）
=0.38×10
=3.8
7．【答案】解：32.4+2.5÷0.4
=32.4＋6.25
=38.65
5.4×2.7+7.3×5.4
=（2.7＋7.3）×5.4
=10×5.4
=54
12.5×88
=12.5×8×11
=100×11
=1100
3.6÷[（8.1+1.9）×0.2]
= 3.6÷[10×0.2]
=3.6÷2
=1.8
8．【答案】解：67.58-（17.58+4.32）
=67.58-17.58-4.32
=50-4.32
=45.68
1.25×2.5×（4×0.8）
=（1.25×0.8）×（2.5×4）
=1×10
=10
7.6×3.4+6.6×7.6
=7.6×（3.4+6.6）
=7.6×10
=76
4.2÷[（5.92-4.52）×0.2]
=4.2÷[1.4×0.2]
=4.2÷0.28
=15
9．【答案】解：8.9-0.46+11.1-0.54
=8.9+11.1-0.46-0.54
=8.9+11.1-（0.46+0.54）
=20-1
=19
1.25×3.2×0.25
=1.25×0.8×4×0.25
=1.25×0.8×（4×0.25）
=1×1
=1
13.28×9.6-3.28×9.6
=（13.28-3.28）×9.6
=10×9.6
=96
5.94÷[0.2×(6-1.5)]
=5.94÷[0.2×4.5]
=5.94÷0.9
=6.6
10．【答案】解：5.8+4.2×0.4
=5.8+1.68
=7.48
125.4-99+73.6
=125.4+73.6-99
=199-99
=100
12.5×0.25×32
=12.5×0.25×（4×8）
=（12.5×8）×（0.25×4）
=100×1
=100
11．【答案】解：4.5×10.1÷0.9
=4.5÷0.9×10.1
=5×10.1
=50.5
0.54÷0.09÷1.5
=6÷1.5
=4
10.1÷0.125
=（10.1×8）÷（0.125×8）
=80.8÷1
=80.8
4.8×0.7÷4.8×0.7
=（4.8÷4.8）×（0.7×0.7）
=1×0.49
=0.49
（12.6＋4.8）÷0.6
=17.4÷0.6
=29
1.62×4.8÷1.6
=1.62×（4.8×1.6）
=1.62×3
=4.86
12．【答案】解：18÷20×3.75
=0.9×3.75
=3.375
1.45× （7.2÷2.4）
=1.45×3
=4.35
0.78+0.22÷5
=0.78+0.044
=0.824
（7.5-2.3×0.4）÷0.01
=（7.5-0.92）÷0.01
=6.58÷0.01
=658
13．【答案】解：
=（0.96×4）÷（2.5×4）
=3.84÷10
=0.384
=10.7-0.54＋0.8
=10.16＋0.8
=10.96
=7.3×（7.3-1＋3.7）
=7.3×10
=73
]
=8÷[31.25×0.4]
=8÷12.5
=0.64
14．【答案】解：3.4×6.6+3.4×3.4
=（6.6＋3.4）×3.4
=10×3.4
=34
12.83-（7.9+2.83）
=12.83-2.83-7.9
=10-7.9
=2.1
9.4÷[（1.3+1.4）÷0.27]
=9.4÷[2.7÷0.27]
=9.4÷10
=0.94
3.7+6.3÷0.21×1.1
=3.7＋30×1.1
=3.7＋33
=36.7
15．【答案】解：16.9+1.05÷0.7
=16.9+1.5
=18.4
8.5×5.67-7.5×5.67
=（8.5-7.5）×5.67
=1×5.67
=5.67
63÷(4.86+5.64)×0.4
=63÷10.5×0.4
=6×0.4
=2.4
16．【答案】解：1.25×32
=1.25×8×4
=10×4
=40
50.6÷0.25÷0.4
=50.6÷（0.25×0.4）
=50.6÷0.1
=506
0.575×29+2.9×4.25
=0.575×29+29×0.425
=29×（0.575+0.425）
=29×1
=29
17．【答案】解：0.58×101
=0.58×（100＋1）
=0.58×100＋0.58×1
=58＋0.58
=58.58
36.45×0.8÷2.7
=36.45÷（9×0.3）×0.8
=36.45÷9÷0.3×0.8
=4.05÷0.3×0.8
=13.5×0.8
=10.8
（6.3＋0.45）÷0.9
=6.75÷0.9
=7.5
18．【答案】解：0.6×15.8－6×0.58
=6×1.58-6×0.58
=6×（1.58-0.58）
=6×1
=6
12.5×[（23.5＋8.5）÷4]
=12.5×[32÷4]
=12.5×8
=100
19．【答案】解：0.25×32×1.25
=（0.25×4）×（8×1.25）
=1×10
=10
6.59×7.5+0.75×34.1
=6.57×7.5+7.5×3.41
=7.5×（6.57+3.41）
=7.5×10
=75
5.5×4.2÷0.7
=23.1÷0.7
=33
20．【答案】解：35.7×101-35.7
=35.7×（101-1）
=35.7×100
=3570
7.4×18.2+7.4×0.8+7.4
=7.4×（18.2+0.8+1）
=7.4×20
=148
（34.5+26.4）×2×5
=60.9×10
=609
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