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简便计算:813×17+57×11312÷[(56-13)×3]24×(14+16-13)4

2022-08-14 02:54:14 问答库 阅读 200 次

问题详情

简便计算:
8

13

×1

7

+5

7

×1

13

12÷[(5

6

-1

3

)×3]

24×(1

4

+1

6

-1

3

)4.5×7.3+41

2

×2.7

1-31

11

÷4

3

×3

4

÷34

11

(1-1

30

)÷(2

3

-1

10

+1

6

-2

5

).

参考答案

(1)813×17+57×113,
=813×17+17×513,
=(813+513)×17,
=1×17,
=17;

(2)12÷[(56-13)×3],
=12÷[56×3-13×3],
=12÷[52-1],
=12÷32,
=8;

(3)24×(14+16-13),
=24×14+24×16-24×13,
=6+4-8,
=10-8,
=2;

(4)4.5×7.3+412×2.7,
=4.5×(7.3+2.7),
=4.5×10,
=45;

(5)1-3111÷43×34÷3411,
=1-3411×34×34×1134,
=1-(3411×1134)×(34×34),
=1-1×916,
=1-916,
=716;

(6)(1-130)÷(23-110+16-25),
=(1-130)÷[(23+16)-(110+25)],
=2930÷[56-12],
=2930÷13,
=2910.

考点: