问题 解答题
解方程.
x-3.6=1.44x=15x+0.42=4.2x÷1.4=0.5.
答案

(1)x-3.6=1.4,

     x-3.6+3.6=1.4+3.6,

             x=5;

(2)4x=15,

  4x÷4=15÷4,

      x=3.75;

(3)x+0.42=4.2,

x+0.42-0.42=4.2-0.42,

          x=3.78;

(4)x÷1.4=0.5,

x÷1.4×1.4=0.5×1.4,

          x=0.7.

单项选择题
选择题