2 câu trả lời
`1/16 + 2/4 = 1/16 + 8/16 = 9/16`
`9/7 + 5/6 = 54/ 42 + 35/42 = 89 / 42`
`10/12 + 5/6 = 10/12 + 10/12 = 20 /12 = 5/3`
`+)1/16+2/4`
`=1/16+8/16`
`=(1+8)/16`
`=9/16`
`+)9/7+5/6`
`=54/42+35/42`
`=(54+35)/42`
`=89/42`
`+)10/12+5/6`
`=5/6+5/6`
`=(5+5)/6`
`=10/6=5/3.`