Đáp án:

 $a)\dfrac{-2}{3}\\
c) \dfrac{-1}{15}\\
e) 0\\
f) -24\\
g)\dfrac{8}{15}$

Giải thích các bước giải:

 $a) \left ( \dfrac{-3}{2}+1 \right ).\dfrac{4}{3}\\
=\left ( \dfrac{-3}{2}+\dfrac{2}{2} \right ).\dfrac{4}{3}\\
=\dfrac{-1}{2}.\dfrac{4}{3}=\dfrac{-2}{3}\\
c) 4-1\dfrac{2}{5}-\dfrac{8}{3}\\
=4-\dfrac{7}{5}-\dfrac{8}{3}\\
= \dfrac{60}{15}-\dfrac{21}{15}-\dfrac{40}{15}\\
=\dfrac{-1}{15}\\
e) \left ( \dfrac{-2}{3}+\dfrac{3}{7} \right ):\dfrac{4}{5}+\left ( \dfrac{-1}{3}+\dfrac{4}{7} \right ):\dfrac{4}{5}\\
=\left (\dfrac{-2}{3}+\dfrac{3}{7}+\dfrac{-1}{3}+\dfrac{4}{7}  \right ):\dfrac{4}{5}\\
=\left (\dfrac{-3}{3}+\dfrac{7}{7}  \right ):\dfrac{4}{5}\\
=(-1+1).\dfrac{5}{4}\\
=0\\
f) \dfrac{8}{3}:\left ( \dfrac{1}{11}-\dfrac{5}{22} \right )+\dfrac{8}{3}:\left ( \dfrac{1}{15}-\dfrac{2}{3}\right )\\
=\dfrac{8}{3}:\left ( \dfrac{2}{22}-\dfrac{5}{22} \right )+\dfrac{8}{3}:\left ( \dfrac{1}{15}-\dfrac{10}{15}\right )\\
=\dfrac{8}{3}: \dfrac{-3}{22}+\dfrac{8}{3}:\dfrac{-9}{15}\\
=\dfrac{8}{3}. \dfrac{-22}{3}+\dfrac{8}{3}.\dfrac{-15}{9}\\
=\dfrac{-176}{9}+\dfrac{-40}{9}\\
=\dfrac{-216}{9}\\
=-24\\
g) \dfrac{1}{10}-\left ( -\dfrac{1}{2}+\dfrac{1}{15} \right )\\
=\dfrac{1}{10}-\left ( -\dfrac{15}{30}+\dfrac{2}{30} \right )\\
=\dfrac{1}{10}-\dfrac{-13}{30}\\
=\dfrac{3}{30}+\dfrac{13}{30}\\
=\dfrac{16}{30}\\
=\dfrac{8}{15}$

Đáp án:

 

Giải thích các bước giải:

 a) `(\frac{-3}{2}+1).4/3`

`=\frac{-1}{2}.\frac{4}{3}`

`=\frac{-2}{3}`

c) `4-1\frac{2}{5}-\frac{8}{3}`

`=4-\frac{7}{5}-\frac{8}{3}`

`=\frac{13}{5}-\frac{8}{3}`

`=\frac{-1}{15}`

e) `(\frac{-2}{3}+\frac{3}{7}):\frac{4}{5}+(\frac{-1}{3}+\frac{4}{7}):\frac{4}{5}`

`=(\frac{-2}{3}+\frac{3}{7}+\frac{-1}{3}+\frac{4}{7}):\frac{4}{5}`

`=(-1+1):4/5`

`=0`

f) `\frac{8}{3}:(\frac{1}{11}-\frac{5}{22})+\frac{8}{3}:(\frac{1}{15}-\frac{2}{3})`

`=\frac{8}{3}:(-\frac{3}{22})+\frac{8}{3}:(-\frac{3}{5})`

`=-\frac{176}{9}-\frac{40}{9}`

`=-24`

g) `1/(10)-(-\frac{1}{2}+\frac{1}{15})`

`=\frac{1}{10}+\frac{1}{2}+\frac{1}{15}`

`=\frac{2}{3}`