A-A+

计算下面各题.A 212÷14×125B 329+514+434+479 C 18.4-(4

2022-08-14 02:32:41 问答库 阅读 200 次

问题详情

计算下面各题.
A、21

2

÷1

4

×12

5


B、32

9

+51

4

+43

4

+47

9


C、18.4-(41

3

-13

4

÷1

2

)÷12

3


D、1

2

+1

6

+1

12

+1

20

+1

30

+1

42


E、34

7

×(71

3

+14

7

)×7

25

÷11

21

参考答案

A、212÷14×125,
=52×4×75,
=14;

B、329+514+434+479,
=(329+479)+(514+434),
=8+10,
=18;

C、18.4-(413-134÷12)÷123,
=18.4-(413-72)÷123,
=18.4-56×35,
=18.4-0.5,
=17.9;

D、12+16+112+120+130+142,
=1-12+12-13+13-14+14-15+15-16+16-17,
=1-17,
=67;

E、347×(713+147)×725÷1121,
=257×725×(713+147)×2122,
=(713+147)×2122,
=223×2122+117×2122,
=7+32,
=812.

考点: