Question

Tại sao 2 phần15 + 1 phần5 lại bằng 1 phần3

Answer 1

`2/15 + 1/5= 2/15 + (1xx3)/(5xx3)= 2/15+ 3/15=5/15=1/3`

Answer 2

2/15+1/5=2/15+3/15=5/15=1/3

Answer 3

2/15+1/5=2/15+3/15=5/15=1/3

Answer 4

Vì:

MSC=15

2/15 = 2/15

1/5= 1x3/5x3=3/15

2/15 + 3/15 = 5/15

Rút gọn 5/15=1/3