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能简便计算的用简便方法计算. 1013÷3526×7347×14+0.25×37-14(78

2022-08-14 02:46:00 问答库 阅读 200 次

问题详情

能简便计算的用简便方法计算.

10

13

÷35

26

×7

3

4

7

×1

4

+0.25×3

7

-1

4

(7

8

+13

16

)÷13

16

1

7

×5

12

+5

12

÷7

5

1

5

÷[(2

3

+1

5

)×1

13

]

1

2

+1

6

+1

12

+1

20

+…1

90

参考答案

(1)1013÷3526×73,
=47×73,
=113;

(2)47×14+0.25×37-14,
=0.25×(47+37-1),
=0.25×0,
=0;

(3)(78+1316)÷1316,
=78×1613+1316×1613,
=1113+1,
=2113;

(4)17×512+512÷75,
=512×(17+57),
=512×67,
=514;

(5)15÷[(23+15)×113],
=15÷[1315×113],
=15÷115,
=3;

(6)12+16+112+120+…190,
=1-12+12-13+13-14+14-15…+19-110,
=1-110,
=910.

考点:方法