用简便方法计算
(1)2.46+8.67+7.36+10.33 (2)8.78﹣3.25﹣1.75﹣1.78 (3)4.28×99
(4)9.3×1.25×8 (5)4.5×3.8+45×0.62.
用简便方法计算
(1)2.46+8.67+7.36+10.33 (2)8.78﹣3.25﹣1.75﹣1.78 (3)4.28×99
(4)9.3×1.25×8 (5)4.5×3.8+45×0.62.