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“考考你”下面各题怎么算简便就怎么算?710×101-71089×89÷89×8935×99

2022-08-14 02:30:37 问答库 阅读 200 次

问题详情

“考考你”下面各题怎么算简便就怎么算?7

10

×101-7

10

8

9

×8

9

÷8

9

×8

9

3

5

×99+3

5

(4

7

+8

9

2

25

15

21

×3

4

+10

21

×3

4

-3

4

34

5

×2536×34

35

(5

6

-5

9

18

5

参考答案

(1)710×101-710
=710×(101-1),
=710×100,
=70;

(2)89×89÷89×89
=89×89×98×89
=(89×89)×(98×89),
=6481×1,
=6481

(3)35×99+35
=35×(99+1),
=35×100,
=60;

(4)(47+89)×225
=9263×225
=1841575

(5)1521×34+1021×34-34
=(1521+1021-1)×34
=421×34
=17

(6)345×25,
=(3+45)×25,
=3×25+45×25,
=75+20,
=95;

(7)36×3435
=(35+1)×3435
=35×3435+1×3435
=34+3435
=343435

(8)(56-59)×185
=56×185-59×185
=3-2,
=1.

考点: