9.9×1.02。怎么算法？
9.91.02怎样巧算
9.9×1.02 =（1-0.1）×（1+0.02）=1×1-1×0.1+1×0.02-0.1×0.02 =1-0.1+0.02-0.002 =0.918 ...
9.9x1.02怎么巧算
9.9x1.02 =（10-0.1）×1.02 =10×1.02-0.1×1.02 =10.2-0.102 =10.098 减法运算性质：一个数减去两个数的和...
9.9×1.02 巧算
9.9×1.02 =10×1.02-0.1×1.02=10.2-0.102=10.098
9.9乘以1.02简便计算
=(10-0.1)x(1+0.02)=10.098
9.9×1.02。怎么算法?
9.9X（100+0.02）=99+0.198=99.198
9.9×1.02 简便计算 我秒采纳
9.9×1.02 =(10-0.1)×1.02 =10×1.02-0.1×1.02 =10.2-0.102 =10.098
简便计算。1.02x9.9=
1.02×9.9 =
1.02×9.9=
1.02x9.9=10.098
1.02×9.9 简便计算 我秒采纳 谢谢
1.02×9.9 =1.02×（10-0.1）=1.02×10-1.02×0.1 =10.2-0.102 =10.098
4.86乘以 9.9的简便计算 4.9乘以1.02的简便计算 3.84...
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...