{8/15-(4/5-3/10)}*15/14等于多少?

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{8/15-(4/5-3/10)}*15/14等于多少?{8/15-(4/5-3/10)}*15/14等于多少?{8/15-(4/5-3/10)}*15/14等于多少?{8/15-(4/5-3/10)

{8/15-(4/5-3/10)}*15/14等于多少?
{8/15-(4/5-3/10)}*15/14
等于多少?

{8/15-(4/5-3/10)}*15/14等于多少?
{8/15-(4/5-3/10)}*15/14
=(8/15-4/5+3/10)x15/14
=8/15x15/14-4/5x15/14+3/10x15/14
=4/7-6/7+9/28
=-2/7+9/28
=-8/28+9/28
=1/28

{8/15-(4/5-3/10)}*15/14等于多少? 8/9-5/12= 7/15-3/20-1/20+3/15 =(7/15+3/15)-(3/20+1/20) =10/15-4/20 = 7/15-3/20-1/20+3/15 =(7/15+3/15)-(3/20+1/20) =10/15-4/20 = 是7/15-3/20-1/20+3/15 =(7/15+3/15)-(3/20+1/20)=10/15-4/20 = (简算) 8/15-(3/5-4/15)简便 (2*5*8+4*10*16+6*15*24)除以(1*4*5+2*8*10+3*12*15) (1*3*5+2*6*10+3*9*15+4*12*20+5*15*25)/(1*2*3+2*4*6+3*6*9+4*8*12+5*10*15)等于多少? 1/3×(15+3/14) 42×(19/14-8/21) 1/5×1/10×75×7/15 9/10×4+2/5 简便计算四道. 0,3/2,8/3,15/4,24/5,() 1.(-5)*(-8)*0*(-10)*(-15)2.(+1/2)*|-2/3|*2 1/4*(-5 1/3) 1 ,2 ,2 ,3 ,8/3 ,( ) A、10/3 B、4 C、15/4 D、5 找规律(1)1,2,4,8,().(2)3,5,6,10,9,15,(),(). (4分之1-10分之1÷2)/10分之3 15分之4*(8分之3+5分之6÷5分之8) 简算 能简算的要简算(3/5+2.4/2/3)/0.71/10*1/8+4/5*1/8+1/80(8/15-9/20)/(3/4+1/8)[4/5+(2/7-2/7)*7/8]/4/5 计算 2/5+5/8+3/5 6/7+7/9 1-4/9-1/6 8/9-(2/15+1/3) 4/3-(1/8+3/10)2/5+5/8+3/5 6/7+7/9 1-4/9-1/6 8/9-(2/15+1/3) 4/3-(1/8+3/10) 14/15-(14/15-4/5)简算5/7+(2/7+3/8) 9/10÷3/8÷1/5 3/4*8/15*5/6 简便计算 计算:(1) 3.8 - 7 ÷ 15 - 2/15 × 4(2)0.6 × 1/15 + 13.4 ÷ 15 + 1/15(3)(8又2/5 -10又1/2 × 4/5 ) ÷ 5又3/4(4) 4又3/5 × 7/9 - 3又3/5 ÷ 1又2/7(5) 2 - ( 2/5 + 2/5 × 3/5) ÷ 8/25(6) 6.3 ×[(1.4 + 1/3 ) ÷ (1)2(x+15)-21=3x-15 (2)3(x+8)=5x+8 (3)4(x+5*0.8)=7x+5*0.8 (4)x=2*[1.25(x-10)-10] 方程, 计算下面各题(能简便的用简便方法) 1/5+7/15+4/15 7/10-(3/4-2/5) 1-7/15-2/5 13/15-(1/3+2/5)1-3/10-2/5 5-3/7+4/7 23/24-1/6-3/8 4/9+1/10+5/9 1/12+3/8+11/12+5/8 1-(3/11-5/9)请在4天内发给我!