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7/8-3/10-1/5怎样简便就怎样算7/8-3/10-1/5 =35/40-12/40-8/40 =15/40=3/8

7/8-3/10+2/5脱式计算简便方法?7/8-3/10+2/5脱式计算简便方法? 7/8-3/10+2/5 =35/40 - 12/40 +16/40 =(35+16-12)/40 =(35+4)/40 =39/40

7/9+8/1+8/3+7/5怎样简便就怎样算,下面还有一题5/-19/1) 原式=7*(1/9+1/5)+8*(1+1/3)=7*14/45+8*4/3=98/45+32*15/45=578/452)原式=5*(1+1/3)-19*(1/7+1

7/4+7/8-3/7+1/8 5/8+3/10-1/8+7/10 简便计7/4+7/8-3/7+1/8 =(4/7-3/7)+(7/8+1/8) =1/7+1 =8/7 5/8+3/10-1/8+7/10 =(5/8-1/8)+(3/10+7

计算下面各题,怎样简便就怎样计算(8×40%+2/5÷1/28×40%+2/5÷1/2 =8×0.4+0.4×2=0.4×(8+2)=0.4×10=44.153.75×10%5/8=4.15-(0.375+0.625)=4.

怎样简便就怎样算。7/8+5/12+1/3。1/6+7/8-11/12?_百度知分数计算 7/8+5/12+1/3 =21/24+10/24+8/24 =13/8 1/6+7/8-11/12 =4/24+21/24-22/24 =1/8

1.算一算(怎样简便就怎样算)5/8+1/4-1/217/20-(2/5+7/1.算一算(怎样简便就怎样算)5/8+1/4-1/2=7/8-1/2=3/817/20-(2/5+7/20)=17/20-7/20-2/5=1/2-2/5=1/107/

【计算下面各题怎样简便就怎样计算3/5+1/4-10/7=14-1/3/5+1/4-7/10=17/20-14/20=3/2014-1/2-2/7=13又1/2-2/7=13又3/145/8-(3/4-1/3)=5/8-5/12=5/245/8+1

【计算下面各题,怎样算简便就怎样计算4/5-3/10+4/151/1:全通分,24/30-9/30+8/30=23/302:1/3+1/6+2/5=1/2+2/5=5/10+4/10=9/103:45/60-12/60-20/60=13/604:3/

7/8-5/3+1/8+2/5简便计算_作你题目…抄错了吧…5/3还是3/5

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