12.6×3.2×0.9怎么简便计算

12.6×3.2×0.9怎么简便计算
2025-06-22 21:02:49
推荐回答(1个)
回答1:

12.6×3.2×0.9怎么简便计算

=12.5x0.8x(4x0.9)+0.1x3.2x0.9
=10x3.6+0.32x0.9
=13.6+0.288
=13.888