4.02×3.7-0.02×3.7+3.5×4用简便方法计算
问题描述:
4.02×3.7-0.02×3.7+3.5×4用简便方法计算
答
4.02×3.7-0.02×3.7+3.5×4
=3.7×(4.02-0.02)+3.5×4
=4×3.7+3.5×4
=4×7.2
=28.8