1.38⼀0.25x40简便运算

2025-06-21 11:47:21
推荐回答(1个)
回答1:

1.38/0.25x40
=(1.38x4)÷(0.25x4)x40(除法中遇25想4简便)
=5.52÷1x40
=5.52x40
=5x40+0.5x40+0.02x40
=200+20+0.8
=220.8