1、(8/15÷0.32-7/9×0.375)÷1 又3/8=
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1、(8/15÷0.32-7/9×0.375)÷1 又3/8=
2、1又3/7×(3又1/13-1又9/11)×0.7×28又3/8=
3、0.5×236×59/119=
4、(1又1/1992×3.6+3又3/5×8又1991/1992)÷9又3/5÷3又3/4=
5、(20又94/95×1.65-20又94/95+20又95/94)×47.5×0.8×2.5=
6、(9又2/7+7又2/9)÷(5/7+5/9)=
2、1又3/7×(3又1/13-1又9/11)×0.7×28又3/8=
3、0.5×236×59/119=
4、(1又1/1992×3.6+3又3/5×8又1991/1992)÷9又3/5÷3又3/4=
5、(20又94/95×1.65-20又94/95+20又95/94)×47.5×0.8×2.5=
6、(9又2/7+7又2/9)÷(5/7+5/9)=
1、(8/15÷0.32-7/9×0.375)÷1 又3/8
=(8/15x25/8-7/9x3/8)x8/11
=(5/3-7/24)x8/11
=11/8x8/11
=1
2、1又3/7×(3又1/13-1又9/11)×0.7×28又3/8
=10/7x(3+1/13-1-9/11)x7/10x(28+3/8)
=(2-106/143)x227/8
=180/143x227/8
=10215/286
(题目有问题)
3、0.5×236×59/119
=118x59/119
=(119-1)x59/119
=119x59/119-59/119
=59-59/119
=58又60/119
4、(1又1/1992×3.6+3又3/5×8又1991/1992)÷9又3/5÷3又3/4=
=3.6x(1又1/1992+8又1991/1992)x[48/5]/[15/4]
=3.6x10x48/5x4/15
=92.16
5、(20又94/95×1.65-20又94/95+20又95/94)×47.5×0.8×2.5=
=20又94/95x(1.65-1+1)x47.5x2
=20又94/95x33/20x95
=1994/95x33/20x95
=3290.1
6、(9又2/7+7又2/9)÷(5/7+5/9)
=(9+2/7+7+2/9)/[80/63]
=(16+32/63)x63/80
=16x63/80+32/63x63/80
=63/5+32/80
=13
=(8/15x25/8-7/9x3/8)x8/11
=(5/3-7/24)x8/11
=11/8x8/11
=1
2、1又3/7×(3又1/13-1又9/11)×0.7×28又3/8
=10/7x(3+1/13-1-9/11)x7/10x(28+3/8)
=(2-106/143)x227/8
=180/143x227/8
=10215/286
(题目有问题)
3、0.5×236×59/119
=118x59/119
=(119-1)x59/119
=119x59/119-59/119
=59-59/119
=58又60/119
4、(1又1/1992×3.6+3又3/5×8又1991/1992)÷9又3/5÷3又3/4=
=3.6x(1又1/1992+8又1991/1992)x[48/5]/[15/4]
=3.6x10x48/5x4/15
=92.16
5、(20又94/95×1.65-20又94/95+20又95/94)×47.5×0.8×2.5=
=20又94/95x(1.65-1+1)x47.5x2
=20又94/95x33/20x95
=1994/95x33/20x95
=3290.1
6、(9又2/7+7又2/9)÷(5/7+5/9)
=(9+2/7+7+2/9)/[80/63]
=(16+32/63)x63/80
=16x63/80+32/63x63/80
=63/5+32/80
=13
7又4/5÷【2又2/3×(1又5/8+2*X)-1又1/10】-2/15÷2/3=1.8
1、(8/15÷0.32-7/9×0.375)÷1 又3/8=
(1又2/3+2又3/4+~+7又8/9+8又9/10)除以(3又1/3+5又2/4+7又3/5+~+15又7/9+17
计算:8又3/4÷[0.375×(7-2又1/14×2又1/3)+1/6]
计算:(1)6又8分之1 减 (9又23分之15 减 3又8分之7)= 2又5分之4 减 1又4分之3 加 7又5分之1
计算 9又3/2÷1又3/2+5.46÷2又5/3×(4.875-2又8/7)=
(12又4分之1-9又6分之5+2又3分之2×2又4分之3)÷1又8分之5
【1又5分之4-2又6分之5+3又10分之7-4又15分之8】÷【-30分之1】=?怎么算,
找规律填空 1又1/4、3又2/9、5又3/16、7又5/25、9又8/36、11又13/49、( )
1 又1/2+3又1/4+5又1/8+7又1/16+9又1/32+11又1/64+13又1/128+15又1/256+1
1+3又1/8+5又1/24+7又1/48+9又1/80+11又1/120+13又1/168+15又1/224+17又1
1+2又1/6+3又1/12+4又1/20+5又1/30+6又1/42+7又1/56+8又1/72+9又1/90=