4.2+0.42*16的简便计算

4.2+0.42*16的简便计算
2025-04-14 01:10:53
推荐回答(1个)
回答1:

=4.2+4.2×1.6
=4.2×(1+1.6)
=4.2×2.6
=4×2.6+0.2×2.6
=10.4+0.52
=10.92
确定就是这个样