2.7*1.58+2.7*2.42+0.5怎样简便
问题描述:
2.7*1.58+2.7*2.42+0.5怎样简便
答
2.7*1.58+2.7*2.42+0.5
=2.7X(1.58+2.42)+0.5
=2.7X4+0.5
=10.8+0.5
=11.3