不改变分式的值,使下列分式的分子与分母的系数均为整数: (1)3a−3/4b1/3a+1/2b=_; (2)0.1x−0.03yo.4x+0.1y=_; (3)0.5m−0.2nm/3+2n=_.
问题描述:
不改变分式的值,使下列分式的分子与分母的系数均为整数:
(1)
=______;3a−
b3 4
a+1 3
b1 2
(2)
=______;0.1x−0.03y o.4x+0.1y
(3)
=______. 0.5m−0.2n
+2nm 3
答
(1)
=3a−
b3 4
a+1 3
b1 2
=(3a−
b)×123 4 (
a+1 3
b)×121 2
;36a−9b 4a+6b
(2)
=0.1x−0.03y o.4x+0.1y
=(0.1x−0.03y)×100 (0.4x+0.1y)×100
;10x−3y 40x+10y
(3)
=0.5m−0.2n
+2nm 3
=(0.5m−0.2n)×30 (
+2n)×30m 3
.15m−6n 10m+60n
故答案为
;36a−9b 4a+6b
;10x−3y 40x+10y
.15m−6n 10m+60n