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计算:(1)2-613÷926-23+1835÷0.6×23(2)[213+(5.4-223

2022-08-14 02:45:05 问答库 阅读 200 次

问题详情

计算:
(1)2-6

13

÷9

26

-2

3

+18

35

÷0.6×2

3


(2)[21

3

+(5.4-22

3

)×12

3

]÷68

9


(3)62.5%×(12

3

+31

6

)+1

6

÷1.6-5

8


(4)512

3

×3

5

+713

4

×4

7

+914

5

×5

9

参考答案

(1)2-613÷926-23+1835÷0.6×23,
=2-613×269-23+1835×53×23,
=2-43-23+47,
=2-(43+23)+47,
=2-2+47,
=47;

(2)[213+(5.4-223)×123]÷689,
=[213+275×53-83×53]÷689,
=[73+9-409]÷689,
=629×962,
=1;

(3)62.5%×(123+316)+16÷1.6-58,
=62.5%×(123+316)+16÷1.6-58,
=58×296+16×58-58,
=(296+16-1)×58,
=4×58,
=52;

(4)5123×35+7134×47+9145×59,
=(50+53)×35+(70+74)×47+(90+95)×59,
=50×35+53×35+70×47+74×47+90×59+95×59,
═30+1+40+1+50+1,
=123.

考点: