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计算下面各题 能简算的要用简便方法计算.①73.25+47+26.75+37②12.5×2.

2022-08-14 02:41:07 问答库 阅读 200 次

问题详情

计算下面各题,能简算的要用简便方法计算.
①73.25+4

7

+26.75+3

7

②12.5×2.5×32③11

27

×1

7

+16

27

÷7

④23.2×15+33.8÷2.6⑤(4

5

+1

4

)÷7

3

+7

10

⑥1

4

÷(3-5

13

-8

13

)

参考答案

①73.25+47+26.75+37,
=(73.25+26.75)+(47+37),
=100+1,
=101;

②12.5×2.5×32,
=(12.5×8)×(2.5×4),
=100×10,
=1000;

③1127×17+1627÷7,
=1127×17+1627×17,
=17×(1127+1627),
=17×1,
=17;

④23.2×15+33.8÷2.6,
=348+13,
=361;

⑤(45+14)÷73+710,
=(1620+520)×37+710,
=2120×37+710,
=920+1420,
=2320,
=1320;

⑥14÷(3-513-813),
=14÷[3-(513+813)],
=14÷[3-1],
=14×12,
=18.

考点:方法