问题 解答题
解方程.
x+2.7=6.512.5-x=4.320.6x=0.72x÷2.7=1.4.
答案

(1)x+2.7=6.5,

x+2.7-2.7=6.5-2.7,

x=3.8;

(2)12.5-x=4.32,

12.5-x+x=4.32+x,

4.32+x=12.5,

4.32+x-4.32=12.5-4.32,

x=8.18;

(3)0.6x=0.72,

0.6x÷0.6=0.72÷0.6,

x=1.2;

(4)x÷2.7=1.4,

x÷2.7×2.7=1.4×2.7,

x=3.78.

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