7.6乘9.9 8.8乘125 简便运算
问题描述:
7.6乘9.9 8.8乘125 简便运算
答
7.6*10-7.6*0.1\7
125*8+125*0.8
答
7.6乘9.9
=7.6*(10-0.1)
=7.6*10-7.6*0.1
=76-0.76
=75.24
8.8乘125
=(8+0.8)*125
=8*125+0.8*125
=1000+100
=1100
请采纳!