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计算下面各题 能用简便方法的要用简便方法计算. (1)449×38×611(2)5×34+3

2022-08-14 02:56:24 问答库 阅读 200 次

问题详情

计算下面各题,能用简便方法的要用简便方法计算. (1)44

9

×3

8

×6

11

(2)5×3

4

+3

4

÷1

7

(3)35×(4

7

-2

5

)

(4)4

5

÷(3-4

15

-11

15

)(5)(0.75-3

16

)×(2

9

+1

3

)(6)6÷6

7

-6

7

÷6.

参考答案


(1)449×38×611,
=449×611×38,
=83×38,
=1;

(2)5×34+34÷17,
=5×34+34×7,
=(5+7)×34,
=12×34,
=9;

(3)35×(47-25),
=35×47-35×25,
=20-14,
=6;

(4)45÷(3-415-1115),
=45÷[3-(415+1115)],
=45÷[3-1],
=45÷2,
=25;

(5)(0.75-316)×(29+13),
=916×59,
=516;

(6)6÷67-67÷6,
=7-17,
=667.

考点:方法