1.9×4点5 0点45用脱式计算怎么算

2025-03-10 15:44:57
推荐回答(1个)
回答1:

1.9×4点5+0点45
=1.9x4.5+4.5x0.1
=4.5x(1.9+0.1)
=4.5x2
=9