五年级上册数学小数简便运算练习题一(附答案)

五年级上册数学小数简便运算练习题（一）

4.2?8.9?5.8

（每题5分，共100分） 17.8?8.4?7.8

5.63?9.9

35.81?24.98

3.27?15.66?6.73?4.34

14.27?3.46?6.54

13.4?3.05

1.25?23?16

0.75?1.3?0.15

56.7?14.3?56.7?4.3

7.46?14?7

0.25?1.76?4

0.125?32?2.5

14.7?2.3?14.7?7.7

9.5?99?9.5

6.28?42.1?62.8?5.79

0.25?16

12.5?25?8

8.2?101

720?2.5?4

参考答案

4.2?8.9?5.8?4.2?5.8?8.9?10?8.9?18.914.27?3.46?6.54?14.27?(3.46?6.54)?14.27?10?4.2713.4?3.05?13.4?(3?0.05)?13.4?3?0.05 ?10.4?0.05?10.35 17.8?8.4?7.8?17.8?7.8?8.4?10?8.4?18.435.81?24.98?35.81?(25?0.02)?35.81?25?0.02 ?10.81?0.02?10.83 5.63?9.9?5.63?(10?0.1)?5.63?10?0.1 ?15.63?0.1?15.533.27?15.66?6.73?4.34?(3.27?6.73)?(15.66?4.34)?10?20?300.25?16?0.25?(4?4) 0.25?1.76?4?0.25?4?1.76?1?1.76?1.760.125?32?2.5?0.125?8?4?2.5?(0.125?8)?(4?2.5) ?1?10?10 ?0.25?4?4 ?1?4?41.25?23?16?1.25?16?23?1.25?8?2?23 ?10?46?46012.5?25?8?12.5?8?25?100?25?48.2?101 0.75?1.3?0.15?0.75?0.15?1.3?5?1.3?6.5 14.7?2.3?14.7?7.7?14.7?(2.3?7.7)?14.7?10?1479.5?99?9.5 ?8.2?(100?1)?8.2?100?8.2?1 ?820?8.2?828.256.7?14.3?56.7?4.3?56.7?(14.3?4.3)?56.7?10?5677.46?14?7?7.46?(14?7)?7.46?2?14.92 ?9.5?99?9.5?1?9.5?(99?1) ?9.5?100?950720?2.5?4?720?(2.5?4)?720?10?72 6.28?42.1?62.8?5.79?6.28?42.1?6.28?57.9?6.28?(42.1?57.9) ?6.28?100?628