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计算下面各题 能简算的要简算.2842÷14+74×347+15-37+455.2-11÷7

2022-08-14 02:46:08 问答库 阅读 200 次

问题详情

计算下面各题,能简算的要简算.
2842÷14+74×3

4

7

+1

5

-3

7

+4

5

5.2-11÷7-1

7

×3

3

4

×4÷4×3

4

6

5

÷[(3

4

-2

3

)÷5

6

]1+1

2

+1

4

+1

8

+1

16

+1

32

参考答案

(1)2842÷14+74×3,
=203+222,
=425;
(2)47+15-37+45,
=(47-37)+(45+15),
=17+1,
=117;
(3)5.2-11÷7-17×3,
=5.2-(11×17+17×3),
=5.2-(11+3)×17,
=5.2-14×17,
=5.2-2,
=3.2;
(4)34×4÷4×34,
=3÷4×34,
=34×34,
=916;
(5)65÷[(34-23)÷56],
=65÷[112×65],
=65÷110,
=12;
(6)1+12+14+18+116+132,
=1+(1632+832+432+232+132),
=1+3132,
=13132.

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