问题
解答题
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答案
(1)x÷1.5=18,
x÷1.5×1.5=18×1.5,
x=27;
(2)x-0.36x=16,
0.64x=16;
0.64x÷0.64=16÷0.64;
x=25;
(3)0.9(x+0.4)=0.45,
0.9(x+0.4)÷0.9=0.45÷0.9,
x+0.4=0.5,
x+0.4-0.4=0.5-0.4,
x=0.1.
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(1)x÷1.5=18,
x÷1.5×1.5=18×1.5,
x=27;
(2)x-0.36x=16,
0.64x=16;
0.64x÷0.64=16÷0.64;
x=25;
(3)0.9(x+0.4)=0.45,
0.9(x+0.4)÷0.9=0.45÷0.9,
x+0.4=0.5,
x+0.4-0.4=0.5-0.4,
x=0.1.