7.63乘9.9加0.763的简便运算大哥教我啊

问题描述:

7.63乘9.9加0.763的简便运算
大哥教我啊

7.63*9.9+0.763
=7.63*9.9+7.63*0.1
=7.63*(9.9+0.1)
=7.63*10
=76.3

哥们设么意思啊?7.63乘9.9加0.763等于76.3

7.63*(10-0.1)+0.763=76.3-0.763+0.763