直接写得数。（）×2= 28×25= = 25+15×=0.75×= = ﹣|﹣|= （+4.5）+（﹣4.5）=
解方程：2（x-16）=8
2.56÷0.15,的商是17，余数是多少？
1.2×3.8+2.4×1.9+4.8×0.6
）×2= 28×25= 
= 25+15×
=
= 
= ﹣|﹣
|= （+4.5）+（﹣4.5）=
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