来自申焱华的问题
简便算法12.8加2.04乘9.5
简便算法12.8加2.04乘9.5
1回答
2019-04-20 16:16
简便算法12.8加2.04乘9.5
简便算法12.8加2.04乘9.5
12.8+2.04*9.5
=12.8+2.04*(10-0.5)
=12.8+2.04*10-2.04*0.5
=12.8+20.4-1.02
=33.2-1.02
=32.18