1.Rút gọn phân số rồi tính a 35/60 + 4/16 b 63/90 + 7/21 19/10/2021 Bởi Bella 1.Rút gọn phân số rồi tính a 35/60 + 4/16 b 63/90 + 7/21
$#DYHUN$ `a) 35/60+4/16` `=7/12+1/4` `=7/12+3/12` `=10/12=5/6` `b)63/90+7/21` `=7/10+1/3` `=21/30+10/30` `=31/30` Bình luận
$a)$ `35/60 + 4/16` `= 7/12 + 1/4` `= 7/12 + 3/12` `= \frac{7+3}{12}` `= 10/12` `= 5/6` `b)` `63/90 + 7/21` `= 7/10 + 1/3` `= 21/30 + 10/30` `= \frac{21+10}{30}` `= 31/30` Bình luận
$#DYHUN$
`a) 35/60+4/16`
`=7/12+1/4`
`=7/12+3/12`
`=10/12=5/6`
`b)63/90+7/21`
`=7/10+1/3`
`=21/30+10/30`
`=31/30`
$a)$
`35/60 + 4/16`
`= 7/12 + 1/4`
`= 7/12 + 3/12`
`= \frac{7+3}{12}`
`= 10/12`
`= 5/6`
`b)`
`63/90 + 7/21`
`= 7/10 + 1/3`
`= 21/30 + 10/30`
`= \frac{21+10}{30}`
`= 31/30`