a.3/8-0,5;b.2/3×(-1/4+5/2)-(-3/2)²;c.1/7×(4/3)² -1/7:9/11;d.-5/11+4/13+(-3/17)+(-6/11)+9/14 Mn giải giúp mik vs ạ

`a`

`3/8 - 0,5`

`=3/8 -1/2`

`=3/8 - 4/8`

`=-1/8`

`b`

`2/3 xx ( -1/2 +5/2) - (-3/2)^2`

`=2/3 xx (-1/4 + 10/4) - 9/4`

`=2/3 xx 9/4 - 9/4`

`=9/4 xx (2/3 - 1)`

`=9/4 xx (-1/3)`

`=-3/4`

`c`

`1/7 xx ( 4/3)^2 - 1/7 : 9/11`

`=1/7 xx 16/9 - 1/7  . 11/9`

`=1/7 xx (16/9 - 11/9)`

`=1/7 xx 5`

`=5/7`

`d`

`-5/11 +4/13 + (-3/17) + (-6/11) +9/14`

`=(-5/11 + (-6)/11) + 4/13 - 3/17 +9/13`

`=-1 + (4/13 +9/13) - 3/17`

`=-1 +1-3/17`

`=-3/17`