简便方法计算99.99X0.8+11.11X2.8
问题描述:
简便方法计算99.99X0.8+11.11X2.8
答
99.99X0.8+11.11X2.8
=11.11X9X0.8+11.11X2.8
=11.11X7.2+11.11X2.8
=11.11X(7.2+2.8)
=11.11X10
=111.1