A-A+

计算(1)56+79+38(2)58-25+14(3)1415-(23-15)(4)1920

2022-08-14 00:32:20 问答库 阅读 200 次

问题详情

计算
(1)5

6

+7

9

+3

8

(2)5

8

-2

5

+1

4

(3)14

15

-(2

3

-1

5

)

(4)19

20

+(4

5

-7

40

)(5)7

6

-(7

10

-1

3

)(6)11

8

-(2

3

-1

4

)

(7)(4+2

7

)-(9

14

+1

2

)(8)13

6

-(3

4

-5

12

+1

3

)

参考答案

(1)56+79+38
=6072+5672+2772
=11672+2772
=14372

(2)58-25+14
=2540-1640+1040
=940+1040
=1940

(3)1415-(23-15),
=1415-715
=715

(4)1920+(45-740),
=1920+2540
=6340

(5)76-(710-13),
=76-1130
=45

(6)118-(23-14),
=118-512
=2324

(7)(4+27)-(914+12),
=427-(914+12),
=427-1614
=307-87
=227

(8)136-(34-512+13),
=136-(912-512+412),
=136-(412+412),
=136-812
=32

考点: