解方程.
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| (1)0.16x+0.4x=8.4 解:0.56x=8.4 0.56x÷0.56=8.4÷0.56 x=15 | (2)12.5+8+x=30.4 解: 20.5+x=30.4 20.5+x-20.5=30.4-20.5 x=9.9 | (3)0.6×95﹣4.8x=31.08 解:57﹣4.8x=31.08 57﹣4.8x+4.8x=31.08+4.8x 31.08+4.8x=57 31.08+4.8x-31.08=57﹣31.08 4.8x÷4.8=25.92÷4.8 x=5.4 |
编辑:chaxungu时间:2026-04-27 13:38:42分类:小学数学题库
解方程.
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| (1)0.16x+0.4x=8.4 解:0.56x=8.4 0.56x÷0.56=8.4÷0.56 x=15 | (2)12.5+8+x=30.4 解: 20.5+x=30.4 20.5+x-20.5=30.4-20.5 x=9.9 | (3)0.6×95﹣4.8x=31.08 解:57﹣4.8x=31.08 57﹣4.8x+4.8x=31.08+4.8x 31.08+4.8x=57 31.08+4.8x-31.08=57﹣31.08 4.8x÷4.8=25.92÷4.8 x=5.4 |