Cả nhà giúp em giải với ạ. Em cảm ơn

Giải thích các bước giải:

1.Ta có:

$-\dfrac3{16}+\dfrac8{15}+\dfrac{-3}{10}\cdot \dfrac7{16}-\dfrac5{16}$

$=-\dfrac3{16}-\dfrac5{16}+\dfrac8{15}+\dfrac{-3}{10}\cdot \dfrac7{16}$

$=-\dfrac8{16}+\dfrac8{15}+\dfrac{-3}{10}\cdot \dfrac7{16}$

$=-\dfrac12+\dfrac8{15}-\dfrac{21}{160}$

$=-\dfrac{240}{480}+\dfrac{256}{480}-\dfrac{63}{480}$

$=\dfrac{-240+256-63}{480}$
$=\dfrac{-47}{480}$

2.Ta có:

$\dfrac{20}3+\dfrac23-\dfrac3{25}+\dfrac25+\dfrac7{15}$

$=\dfrac{22}3-\dfrac3{25}+\dfrac25+\dfrac7{15}$

$=\dfrac{550}{75}-\dfrac{9}{75}+\dfrac{30}{75}+\dfrac{35}{75}$

$=\dfrac{550-9+30+35}{75}$

$=\dfrac{606}{75}$

$=\dfrac{202}{25}$

3.Ta có:

$\dfrac{11}8+(-\dfrac32)^3+\dfrac{28}2\cdot\dfrac17$

$=\dfrac{11}{8}-\dfrac{27}{8}+2$

$=-2+2$

$=0$