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计算下面各题 能简便的要写出简算过程.①613÷926×23②57×23+27÷32③(11

2022-08-14 02:59:38 问答库 阅读 200 次

问题详情

计算下面各题,能简便的要写出简算过程.
①6

13

÷9

26

×2

3


②5

7

×2

3

+2

7

÷3

2


③(1

15

+3

49

)×15-45

49


④[1-(3

8

+1

4

)]÷1

4


⑤(5

11

+9

17

)×11×17
⑥7

8

÷4-0.25×5

8

参考答案

①613÷926×23,
=43×23,
=89;

②57×23+27÷32,
=57×23+27×23,
=(57+27)×23,
=1×23,
=23;

③(115+349)×15-4549,
=115×15+349×15-4549,
=1+4549-4549,
=1-(4549-4549),
=1-0,
=1;

④[1-(38+14)]÷14,
=[1-58]÷14,
=38÷14,
=32;

⑤(511+917)×11×17,
=(511+917)×(11×17),
=511×(11×17)+917×(11×17),
=5×17+9×11,
=85+99,
=184;


⑥78÷4-0.25×58,
=78×14-14×58,
=14×(78-58),
=14×14,
=116.

考点:过程