9分之8乘5分之4加9分之8乘5分之2减9分之8=? 请用简便方法计算

2025-01-19 20:38:39
推荐回答(3个)
回答1:

看好了:8/9*4/5+8/9*2/5-8/9
=8/9*(4/5+2/5)-8/9
=8/9*6/5-8/9
=8/9*6/5-8/9*1
=8/9*(6/5-1)
=8/9*1/5
=8/45 绝对准确!
望采纳

回答2:

8/9*4/5+8/9*2/5-8/9
=8/9*(4/5+2/5)-8/9
=8/9*5/6-8/9
=8/9*(6/5-1)
=8/9*1/5
=8/45

回答3:

简单!8/9×4/5+8/9×5/2-8/9
=8/9×(4/5+2/5-1)
=8/9×1/5
=8/45