笔算下面各题.2.8﹣1.9=2.6+1.8=3.2﹣1.5=
计算题3.83×76+11×9.25+427×0.24
计算下面各题,能简便的要简便。(1)(12.6+4.8)÷0.6 (2)9.8×2.1+98×0.79
4.83×0.59+0.41×1.59-0.324×5.9
199.8×19.99-199.9×19.97
下面各题怎样简便就怎样算。(1)32.7×1.4-1.4×2.7 (2)7.5+2.5×0.36