简便算法：3×22.5%+2.25×7

简便算法：3×22.5%+2.25×7
简便算法：3×22.5%+2.25×7

简便算法：3×22.5%+2.25×7
3×22.5%+2.25×7＝2.25*7.3

=3（0.225+2.25)+4(2.25)=3(0.675+2.25)+10,结果自己计算吧

这个简便算法也不简便多少。不会是题打错了吧
3×22.5%+2.25×7＝2.25*7.3