A-A+

脱式计算(能简算的要简算 写出主要步骤)①3.6-2.8+7.4-7.2         ②

2022-08-14 02:47:34 问答库 阅读 200 次

问题详情

脱式计算(能简算的要简算,写出主要步骤)
①3.6-2.8+7.4-7.2         ②8

17

÷23+1

23

×9

17

+1

23

③(1

2

+1

3

)÷3

5

-17

18

        ④18÷[5

6

+(5

8

-1

3

)]

⑤3.8×0.73+0.73×6.2⑥3.27×99+3.27.

参考答案

①3.6-2.8+7.4-7.2
=(3.6+7.4)-(2.8+7.2)
=11-10
=1;

②817÷23+123×917+123
=(817+917+1)×123
=2×123
=223;

③(12+13)÷35-1718
=56÷35-1718
=2518-1718
=49;

④18÷[56+(58-13)]
=18÷[56+724]
=18÷2724
=16;

⑤3.8×0.73+0.73×6.2
=(3.8+6.2)×0.73
=10×0.73
=7.3;

⑥3.27×99+3.27
=3.27×(99+1)
=3.27×100
=327.

考点:步骤