6.7-0.4+2.3-1.6 的简便预算
问题描述:
6.7-0.4+2.3-1.6 的简便预算
答
=(6.7+2.3)-(0.4+1.6)
=9-2
=7
6.7-0.4+2.3-1.6 的简便预算
=(6.7+2.3)-(0.4+1.6)
=9-2
=7