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苏教版五年级数学上册期末
专题测试题及答案(2)
小数的四则(混合)运算专项卷
一、直接写出得数。(每题 1 分,共 10 分)
0.7+0.23= 0.53-0.3=
0.2×0.7= 9.6÷4=
3÷0.6= 1-0.01=
0.63÷0.9= 0.13×0.4=
4.8+0.8= 1.4×3÷1.4×3=
二、用竖式计算,最后两题要验算。(每题 3 分,共 24 分)
2.58+3.47= 3.6+4.98=
6.2-4.95= 100-25.96=
7.5×0.24= 4.12×3.5=
8.84÷1.7= 29.9÷0.26=
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三、按要求计算。(每题 3 分,共 12 分)
13.5×26.7 (保留一位小数)
3.08×0.43 (保留两位小数)
9.02÷1.3 (保留一位小数)
4.34÷2.4 (保留两位小数)
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四、脱式计算。(每题 3 分,共 24 分)
4.8-4.8×0.5 64-2.64×0.5
2.55÷1.7-0.59 3.2×5.6-11.4
(3.12+0.9)÷(1-0.4) 2.5×(7.5+2.9)÷ 8
20-15.54÷(3.7×2.8) 6.48÷[(1.4-0.8)×0.9]
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五、下面各题,怎样简便就怎样算。(每题 3 分,共 30 分)
1.9+0.56+8.1+0.44 27.85-(3.4-2.15)
1.25×9.6×0.08 3.45÷0.25÷4
31.54-2.68-12.32 0.75×3.2×1.25
7.2÷4.5 3.25×101-3.25
3.6×102 6.6×7.8+0.66×22
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答案
一、0.93 0.23 0.14 2.4 5 0.99 0.7 0.052 5.6 9
二、2.58+3.47=6.05 3.6+4.98=8.58
6.2-4.95=1.25 100-25.96=74.04
7.5×0.24=1.8 4.12×3.5=14.42
8.84÷1.7=5.2
29.9÷0.26=115
三、13.5×26.7≈360.5 3.08×0.43≈1.32
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9.02÷1.3≈6.9 4.34÷2.4≈1.81
四、 4.8-4.8×0.5 64-2.64×0.5
=4.8-2.4 =64-1.32
=2.4 =62.68
2.55÷1.7-0.59 3.2×5.6-11.4
=1.5-0.59 =17.92-11.4
=0.91 =6.52
(3.12+0.9)÷(1-0.4) 2.5×(7.5+2.9)÷ 8
=4.02÷0.6 =2.5×10.4÷8
=6.7 =26÷8
=3.25
20-15.54÷(3.7×2.8) 6.48÷[(1.4-0.8)×0.9]
=20-15.54÷10.36 =6.48÷(0.6×0.9)
=20-1.5 =6.48÷0.54
=18.5 =12
五、 1.9+0.56+8.1+0.44 27.85-(3.4-2.15)
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=(1.9+8.1)+(0.56+0.44) =27.85+2.15-3.4
=10+1 =30-3.4
=11 =26.6
1.25×9.6×0.08 3.45÷0.25÷4
=1.25×0.08×9.6 =3.45÷(0.25×4)
=0.1×9.6 =3.45÷1
=0.96 =3.45
31.54-2.68-12.32 0.75×3.2×1.25
=31.54-(2.68+12.32) =(0.75×4)×(0.8×1.25)
=31.54-15 =3×1
=16.54 =3
7.2÷4.5 3.25×101-3.25
=7.2÷0.9÷5 =3.25×(101-1)
=8÷5 =3.25×100
=1.6 =325
3.6×102 6.6×7.8+0.66×22
=3.6×100+3.6×2 =6.6×7.8+6.6×2.2
=360+7.2 =6.6×(7.8+2.2)
=367.2 =6.6×10
=66