脱式计算,(能简算的要简算)

2025-12-25 06:47:55
推荐回答(3个)
回答1:

回答2:

2/9+4÷4/5+2/3
=2/9+4×5/4+2/3
=2/9+5+2/3
=5+2/9+2×3/3×3
=5+2/9+6/9
=5+8/9
=5×9/9+8/9
=45/9+8/9
=53/9

回答3: