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用合适的方法计算下面各题. (34-325)×10027×1711+511×2738×101

2022-08-14 02:39:34 问答库 阅读 200 次

问题详情

用合适的方法计算下面各题. (3

4

-3

25

)×100

2

7

×17

11

+5

11

×2

7

3

8

×10

11

+5

8

÷11

10

(12×5

6

-7.3)÷9

4

8

9

÷〔(2

5

+1

10

)×4

3

〕(9

13

×27-9

13

)×7

18

参考答案

(1)(34-325)×100,
=34×100-325×100,
=75-12,
=63;

(2)27×1711+511×27,
=27×(1711+511),
=27×2,
=47;

(3)38×1011+58÷1110,
=38×1011+58×1011,
=(38+58)×1011,
=1×1011,
=1011;

(4)(12×56-7.3)÷94,
=(10-7.3)÷94,
=2.7×49,
=1.2;

(5)89÷〔(25+110)×43],
=89÷〔12×43〕,
=89×32,
=43;

(6)(913×27-913)×718,
=[(913×(27-1)]×718.
=[913×26]×718,
=18×718,
=7.

考点:方法