问题描述: 4.86乘以 9.9的简便计算 4.9乘以1.02的简便计算 3.84乘以9.6+0.96乘以61.6 1个回答 分类:数学 2014-11-16 问题解答: 我来补答 4.86× 9.9=4.86×10-4.86×0.1=48.6-0.486=48.1144.9×1.02=5×1.02-0.1×1.02=5.1-0.102=4.9983.84乘以9.6+0.96乘以61.6=3.84×9.6+9.6×6.16=9.6×(3.84+6.16)=9.6×10=96 展开全文阅读