解方程. x+2.7=6.5
解方程.x+2.7=6.512.5-x=4.320.6x=0.72x÷2.7=1.4....
解方程. x+2.7=6.5 12.5-x=4.32 0.6x=0.72 x÷2.7=1.4.
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2014-10-30
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(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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