9000÷25 简便运算(4/5-1/16*4/5)/(1/6+1/12) 500-(720+650/130)*6.4

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/07 03:55:11

9000÷25 简便运算(4/5-1/16*4/5)/(1/6+1/12) 500-(720+650/130)*6.4
9000÷25 简便运算
(4/5-1/16*4/5)/(1/6+1/12) 500-(720+650/130)*6.4

9000÷25 简便运算(4/5-1/16*4/5)/(1/6+1/12) 500-(720+650/130)*6.4
9000÷25=90×100÷25=90×4=360
.
(4/5-1/16*4/5)/(1/6+1/12)
=【(4/5)×(1- 1/16)】÷(3/12)
=[(4/5)×(15/16)]÷(1/4)
=(3/4)×4
=3
.
500-(720+650/130)*6.4
=500- (720+5)*6.4
=500 - 725*6.4
=500 - 700*6.4 - 25*4*1.6
=500 - 4480 - 160
=500 - 4640
=-4140

90000除以25=90X100除以25
=90X4
=360。
(4/5--1/16*4/5)/(1/6+1/12)=[4/5(1--1/16)]/(3/12)
...

全部展开

90000除以25=90X100除以25
=90X4
=360。
(4/5--1/16*4/5)/(1/6+1/12)=[4/5(1--1/16)]/(3/12)
=[(4/5)x(15/16)]/(1/4)
=(3/4)/(1/4)
=3.
500--(720+650/130)*6.4=500--(720+5)*6.4
=500--720X6.4--5X6.4
=500--32--720(6.5--0.1)
=500--32--4680+72
=500+40--4680
=500--4640
=--4140.

收起