Giải nhanh cho em nhé :))

Bài 5:
a, `3/8 - 4/5 - -17/40`
`= -17/40 - -17/40`
`= 0`
b, `3/4 - 16/32 + 4/-3`
`= 3/4 - 1/2 + -4/3`
`= 1/4 + ( -4/3 )`
`= -13/12`
c, `-4/7 + 2/3 xx -9/14`
`= -4/7 + -3/7`
`= -7/7`
`= -1`
d, `8 2/7 - ( 3 4/9 + 4 2/7 )`
`= 53/7 - ( 31/9 + 30/7 )`
`= 53/7 - 61/7`
`= -8/7`
e, `( 2/3 - 1 1/2 ) : 4/3 + 1/2`
`= ( 2/3 - 3/2 ) xx 3/4 + 1/2`
`= -5/6 xx 3/4 + 1/2`
`= -5/8 + 1/2`
`= -1/8`
f, `-5/13 + 2/5 + -8/13 + 3/5 - 3/7`
`= ( -5/13 + -8/13 ) + ( 2/5 + 3/5 ) - 3/7`
`= -1 + 1 - 3/7`
`= -3/7`
Bài 5:
a, `-5/12 . 2/11  + -5/12 . 9/11 + 5/12`
`= -5/12 . ( 2/11 + 9/11 ) + 5/12`
`= -5/12 . 1 + 5/12`
`= 0`
b, `-3/5 : 7/5 - 3/5 : 7/5 + 2 3/5`
`= -3/5 : ( 7/5 - 7/5 ) + 13/5`
`= -3/5 : 0 + 13/5`
`= 13/5`
c, `-3/7 . 5/9 + 4/9 . -3/7 + ( - 2022 )^0`
`= -3/7 . ( 5/9 + 4/9 ) + 1`
`= -3/7 . 1 + 1`
`= -6/7`
d, `0, 75 - ( 2 1/3 + 0, 75 ) + 3^2 . ( -1/9 )`
`= 0, 75 - 7/3 - 0, 75 - 1`
`= ( 0, 75 - 0, 75 ) - 7, 3 - 1`
`= -8,3`
e, `2 6/7 . [ ( -7/5 - 3/2 : -5/-4 ) + ( 3/2 )^2 ]`
`= 20/7 . [ ( -7/5 - 6/5 ) + 9/4]`
`= 20/7 . [ -13/5 + 9/4 ]`
`= 20/7 . -7/20`
`= -1`
f, `2/7 + 5/7 . ( 3/5 - 0, 25 ) . ( - 2)^2 + 35%`
`= 2/7 + 5/7 . 7/20 . 4 + 7/20`
`= 2/7 + 1/4 . 4 + 7/20`
`= 2/7 + 1 +7/20`
`= 9/7 + 7/20`
`= 229/140`