计算下面各题,能简算的要简算。(脱式计算)
(6/35+4/21)÷4/7 2/9÷2/7÷14/15
= =
= =
(5/6-3/4)÷5/12+4/5 3/10÷(4/5-1/2)
= =
= =
=
2/25÷3/7+23/25÷3/7 8/9÷5/6+1/6
= =
= =
解方程。
2/3x=16 3/4x+1/4=3/8 1/5x-1/2=3/10
上面多数字了,下面采纳一下:
6/35X7/4十4/2lX7/4=3/10十1/3=9/30十10/30=19/30
2/9X7/2X1/14=1/18
上面多数字了,下面采纳一下:
6/35X7/4十4/2、lX7/4=3/10十1/3=9/30十10/30=19/30
2/9X7/2X1/14=1/18
5/6X12/5一3/4X12/5十4/5=2一9/5十4/5=1
3/10X5/4一3/10X2/12=3/8一3/5=15/40一24/40=一9/40
(2/25十23/25)X7/3=7/3
8/9X6/5十1/6=16/15十1/6=32/30十5/30=37/30
下面自写太麻烦了