tính nha
a,$\frac{5}{3}$- $\frac{3}{4}$ +$\frac{7}{6}$
b,$\frac{2}{7}$ -$\frac{7}{5}$- $\frac{-2}{35}$
c,3- $\frac{1}{2}$ +$\frac{-5}{-6}$
d,$\frac{-3}{4}$-$\frac{7}{10}$ + $\frac{-5}{6}$
f,$\frac{38}{45}$-( $\frac{8}{45}$ -$\frac{17}{51}$ -$\frac{3}{11}$)
mik hứa cho ctlhn
a. 5/3 – 3/4 + 7/6
= 20/12 – 9/12 + 14/12
= 25/12
b. 2/7 – 7/5 – (-2/35)
= 10/35 – 49/35 + 2/35
= -37/35
c. 3 – 1/2 + (-5/-6)
= 18/6 – 3/6 + 5/6
= 20/6
= 10/3
d. -3/4 – 7/10 + (-5/6)
= -45/60 – 42/60 – 50/60
= -137/60
f. 38/45 – (8/45 – 17/51 – 3/11)
= 38/45 – 8/45 + 17/51 + 3/11
= 30/45 + 1/3 + 3/11
= 2/3 + 1/3+ 3/11
= 1 + 3/11
= 11/11 + 3/11
= 14/11
Đáp án-Giải thích các bước giải:
`a) 5/3-3/4+7/6`
`=(20-9+14)/12`
`=25/12`
`b)2/7-7/5-(-2)/35`
`=(10-49+2)/35`
`=-37/35`
`c)3-1/2+(-5)/(-6)`
`=3-1/2+5/6`
`=(18-3+5)/6`
`=20/6=10/3`
`d)-3/4-7/10+(-5)/6`
`=(-3.15-7.6+(-5).10)/60`
`=(-45-42-50)/60`
`=-137/60`
`e)38/45-(8/45-17/51-3/11)`
`=38/45-8/45+17/51+3/11`
`=30/45+17/51+3/11`
`=14/11`