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

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4.86× 9.9
=4.86×10-4.86×0.1
=48.6-0.486
=48.114
4.9×1.02
=5×1.02-0.1×1.02
=5.1-0.102
=4.998
3.84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

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 2.5乘以12.5乘以0.8乘以0.4的简便计算 0.25乘以1.25乘以32的简便计算 125乘以83减25乘以15的简便计算 25乘以19乘以40的积,用简便计算 125乘以25乘以64等于的简便计算 4.5乘以4.5除以4.5乘以4.5的简便计算 250乘以13乘以14的简便计算急谢谢 48乘以25的简便计算 125乘以64的简便计算 29.8乘以2.5的简便计算 35乘以40.2 的简便计算