Question

九分之四乘以十二分之五加九分之五乘以十二分之五（简便计算）

Answer 1

4/9×5/12+5/9×5/12
＝（4/9+5/9）×5/12
＝1×5/12
＝5/12
你好，本题已解答,如果满意
请点右下角“采纳答案”。

Answer 2

九分之四乘以十二分之五加九分之五乘以十二分之五
=(4/9)x(5/12) + (5/9)x(5/12)
=[5/(9x12)] x( 4+5)
=[5/(9x12)] x9
=5/12