9.8乘25 简便运算!
问题描述:
9.8乘25 简便运算!
答
(10-0.2)*25 =10*25-0.2*25=250-5=245
答
9.8=10-0.2
化为(10-0.2)*25
即250-5=245
答
9.8乘25
=(10-0.2)×25
=10×25-0.2×25
=250-5
=245