7/15 + 5/6 – 3/10
3/7 . 2/3 + 51/14 . 2/3 – 20/21
4/5 . 15 2/3 -4/5.20 2/3
7/15 + 5/6 – 3/10 3/7 . 2/3 + 51/14 . 2/3 – 20/21 4/5 . 15 2/3 -4/5.20 2/3
By Melanie
By Melanie
7/15 + 5/6 – 3/10
3/7 . 2/3 + 51/14 . 2/3 – 20/21
4/5 . 15 2/3 -4/5.20 2/3
`7/15 + 5/6 – 3/10`
`= 14/30 + 25/30 – 9/30`
`=(14+25-9)/30`
`=30/30 = 1`
`3/7 . 2/3 + 5/14 . 2/3 – 20/21`
`= 2/3 . (3/7 + 5/14 ) – 20/21`
`=2/3 . (6/14 + 5/14) – 20/21`
`=2/3 . 11/14 – 20/21`
`= 11/21 – 20/21`
`=-3/7`
`4/5 . 15 2/3 – 4/5 . 20 2/3`
`= 4/5 . ( 15 2/3 – 20 2/3 )`
`=4/5 . (-5)`
`=(-4)`
#TEAM_IQ_2000
7/15 + 5/6 – 3/10 = 14/30 + 25/30 – 9/30
= 1
-3/7 . 2/3 + 5/14 . 2/3 – 20/21 = -3/7 . 2/3 + 5/14 . 2/3 – 10/7.2/3
= 2/3.(-3/7+5/14-10/7)
= 2/3. (-3)
= -2
4/5 . 15 2/3 -4/5.20 2/3 = 4/5. (15 2/3-20 2/3)
= 4/5. (-5)
= -4