小数乘除法百题竞赛

五年级小数乘除法百题竞赛

一.计算(43’)

85.44÷16 = 42.84÷7 = 101.7÷9 = 67.5÷15 = 21.24÷36= 0.736÷23= 43.5÷12= 35.21÷7 = 6.21÷0.03= 210÷1.4= 51.3÷0.27= 91.2÷3.8 = 0.66÷0.3= 11.97÷1.5= 69.6÷2.9= 38.4÷0.8 = 5.6×2.9 = 3.77×1.8 = 0.02×96 = 5.22×0.3= 9.99×0.02 = 4.67×0.9 = 5×2.44= 1.6×6.1= 5.6×6. = 4.88×2.9 = 5.61×4.3 = 8.9×2.4 = 5.5×55= 1.384×5.1= 8.78×83 = 2.6×61 = 0.059×0.2= 4.268×1= 57×5.7= 9.4×2.8= 17.8×6.4 = 1.5×4.9 = 5.5×5.2= 2.2×3.3= 7.6×85 = 36.02×0.3 = 56.78×8=

二.(循环小数的用简便方法,除不尽保留2位小数):(10’)

8.2÷0.12≈0.8÷0.9 ≈76.4÷5.4 ≈ 4.7÷3 ≈ 1.25÷1≈

32÷42≈14.36÷2.7≈8.33÷6.2 ≈ 1.7÷0.03≈ 2.41÷3≈三.用竖式计算(28’)

0.396÷1.2= 0.756÷0.36= 15.6×13= 0.18×15= 0.025×14= 3.06×36= 0.04×0.12= 3.84×2.6= 5.76×3=7.15×22= 90.75÷3.3= 3.68×0.4= 16.9÷0.13= 1.55÷3.9= 3.7×0.016 = 13.76×0.8=

5.2×0.6= 8.4×1.3 =

6.4×0.5 = 4.48×0.4 = 5.25×5 = 35.4×4.2= 0.042×0.54 = 0.76×0.5=

0.25×0.046 = 2.52×3.4 = 1.08×25 = 0.12×0.5=

四、脱式计算(能简算的要简算)(19’)

2.5×7.1×4 16.12×99+16.12 7.28×99+7.28 4.3×50×0.2 26×15.7+15.7×24 (2.275 +0.625)×0.28

3.94+3

4.3×0.2

1.2×(9.6÷

2.4)÷4.8

3.6×9.85-5.46

4.8-4.8×0.5

8.05×3.4+7.6 2.8×0.5+1.23 56.5×99+56.5

4.8 ×(15 ÷ 2.4) 4.85 + 0.35 ÷ 1.4 8.7 × 17.4 - 8.7 × 7.4 12.5×0.4×2.5×8 9.5×101 0.25×0.23 ×0.4

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