四点5×6点二零的竖式计算

2025-04-12 13:47:00
推荐回答(1个)
回答1:

4.5×6.2
=4.5×(6+0.2)
=4.5×6+4.5×0.2
=4.5×2×3+0.9
=9×3+0.9
=27+0.9
=27.9