计算下面各题,能简算的要简算.3/5÷6÷1/15速度!
问题描述:
计算下面各题,能简算的要简算.3/5÷6÷1/15速度!
3/5÷6÷1/15 50×(3/10+1/5) 3/8×4/7÷3/8×4/7
2/7÷8+5/7×1/8 15÷9/25×4/5 ﹙13-3/10﹚÷3/5
是分数除法!越快越好!
答
3/5÷6÷1/15 =3/5÷1/15÷6 =3/5x15÷6=9÷6=1.550×(3/10+1/5) =50×(3/10+2/10) =50×1/2=253/8×4/7÷3/8×4/7 =3/8÷3/8×4/7×4/7=1×4/7×4/7=16/492/7÷8+5/7×1...