问题
解答题
解方程.
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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.
解方程.
|
(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.