/ là phần của phân số . 1, 5/3 - 3/4 =7/6 2, -1/5 + 5/3 -3/2 3, 2/7 - 7/5 + -2/35 4, 4 - 1/3 + 3/5 5, 1/5 - 1/2 + 1/3 6, 3-1/2 + 1/5 7, 1/4 - 7/8 + -9/10 8, -5/8 -1/3 +-7/6 9, -5/8 - 1/3 +-7/6 giúp mình với mình đang cần gấp

Đáp án+Giải thích các bước giải:

`2. -1/5 + 5/3 - 3/2 = (22)/(15) - 3/2 = -1/(30)`

`3. 2/7 - 7/5 + (-2/35) = -(39)/(35) + (-2/35) = -(41)/(35)`

`4. 4 - 1/3 + 3/5 = (11)/3 + 3/5 = (64)/(15)`

`5. 1/5 - 1/2 + 1/3 = -3/(10) + 1/3 = 1/(30)`

`6. 3 - 1/2 + 1/5 = 5/2 + 1/5 = (27)/(10)`

`7. 1/4 - 7/8 + (-9/10) = -5/8 + (-9/10) = -(61)/(40)`

`8. -5/8 - 1/3 + (-7/6) = -(23)/(24) + (-7/6) = -(17)/8`

Đáp án : 
2 . $\dfrac{-1}{30}$
3 . $\dfrac{-41}{35}$
4 . $\dfrac{64}{15}$
5 . $\dfrac{1}{30}$
6 . $\dfrac{27}{10}$
7 . $\dfrac{61}{40}$
8 . $\dfrac{3}{2}$
Giải thích các bước giải:
2 . $\dfrac{-1}{5}$ + $\dfrac{5}{3}$ - $\dfrac{3}{2}$ 
= $\dfrac{-6}{30}$ + $\dfrac{50}{30}$ - $\dfrac{45}{30}$
= $\dfrac{44}{30}$ - $\dfrac{45}{30}$
= $\dfrac{-1}{30}$
3 . $\dfrac{2}{7}$ - $\dfrac{7}{5}$ + $\dfrac{-2}{35}$
= $\dfrac{10}{35}$ - $\dfrac{49}{35}$ + $\dfrac{-2}{35}$
= $\dfrac{-39}{35}$ + $\dfrac{-2}{35}$
= $\dfrac{-41}{35}$
4 . 4 - $\dfrac{1}{3}$ + $\dfrac{3}{5}$
= $\dfrac{4}{1}$ - $\dfrac{1}{3}$ + $\dfrac{3}{5}$
= $\dfrac{60}{15}$ - $\dfrac{5}{15}$ + $\dfrac{9}{15}$
= $\dfrac{55}{15}$ + $\dfrac{9}{15}$
= $\dfrac{64}{15}$
5 . $\dfrac{1}{5}$ - $\dfrac{1}{2}$ + $\dfrac{1}{3}$
= $\dfrac{6}{30}$ - $\dfrac{15}{30}$ + $\dfrac{10}{30}$
= $\dfrac{-9}{30}$ + $\dfrac{10}{30}$
= $\dfrac{1}{30}$
6 . 3 - $\dfrac{1}{2}$ + $\dfrac{1}{5}$
= $\dfrac{3}{1}$ - $\dfrac{1}{2}$ + $\dfrac{1}{5}$
= $\dfrac{30}{10}$ - $\dfrac{5}{10}$ +$\dfrac{2}{10}$
= $\dfrac{25}{10}$ + $\dfrac{2}{10}$
= $\dfrac{27}{10}$
7 . $\dfrac{1}{4}$ - $\dfrac{7}{8}$ + ( $\dfrac{-9}{10}$ )
= $\dfrac{80}{320}$ - $\dfrac{280}{320}$ + $\dfrac{-288}{320}$
= $\dfrac{-488}{320}$
= $\dfrac{61}{40}$
8 . $\dfrac{-5}{8}$ - ( $\dfrac{-1}{3}$ ) + ( $\dfrac{-7}{6}$ )
= $\dfrac{-5}{8}$ + $\dfrac{1}{3}$ + ( $\dfrac{-7}{6}$ )
= $\dfrac{-90}{144}$ + $\dfrac{42}{144}$ + $\dfrac{-168}{144}$
= $\dfrac{-48}{144}$ + $\dfrac{-168}{144}$ = $\dfrac{216}{144}$
= $\dfrac{3}{2}$