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下面各题怎样算简便就怎样算.①(12-27)×14②413×17+413×67③15×(9.

2022-08-14 02:42:09 问答库 阅读 200 次

问题详情

下面各题怎样算简便就怎样算.
①(1

2

-2

7

)×14②4

13

×1

7

+4

13

×6

7

③15×(9.6-8.6)÷1.2

④15-9

20

-3

5

⑤(10×2

5

+6)×13

14

2

3

×[1-(1

3

-1

4

)]×5

11

参考答案

①(12-27)×14
=12×14-27×14,
=7-4,
=3;

413×17+413×67
=(17+67)×413
=1×413
=413

③15×(9.6-8.6)÷1.2
=15×1÷1.2,
=15÷1.2,
=12.5;

④15-920-35
=15-920-1220
=141120-1220
=131920

⑤(10×25+6)×1314
=(4+6)×1314
=10×1314
=657

23×[1-(13-14)]×511
=23×[1-(412-312)]×511
=23×[1-112511
=23×1112×511
=518

考点: