A-A+

能简算的要简算.①23×38+57÷83②1.36×2.7+13.6×0.73③0.25×1

2022-08-14 02:06:01 问答库 阅读 200 次

问题详情

能简算的要简算.
①23×3

8

+57÷8

3


②1.36×2.7+13.6×0.73
③0.25×1.25÷1

32


④(3

8

+7

8

-2

3

)×24
⑤[1-7

8

÷(5

6

+1

2

×1

3

)]÷7

12


⑥2008×1

2007

参考答案

①23×38+57÷83
=(23+57)×38
=80×38
=30;

②1.36×2.7+13.6×0.73,
=1.36×2.7+1.36×7.3
=1.36×(2.7+7.3),
=1.36×10,
=13.6;

③0.25×1.25÷132
=0.25×1.25×32,
=(0.25×4)×(1.25×8),
=1×10,
=10;

④(38+78-23)×24,
=38×24+78×24-23×24,
=9+21-16,
=14;

⑤[1-78÷(56+12×13)]÷712
=[1-78÷1]÷712
=18÷712
=314

⑥2008×12007
=(2007+1)×12007
=2007×12007+12007
=1+12007
=112007

考点: