3.2x1.8+2.54简便计算

急。。。
2025-04-14 02:56:03
推荐回答(1个)
回答1:

3.2x1.8+2.54
=3.2x(2.0-0.2)+2.54
=3.2x2.0-3.2x0.2+2.54
=6.4-0.64+2.54
=6.4+(2.54-0.64)
=6.4+1.9
=8.3