Help with evaluating expressions and showing their hierarchy

As the name suggests, I'm new and working my way through a C book for which I don't have an answer key, so I was wondering if any of you could look through my work and tell me if it's correct:

Evaluate the following expressions and show their hierarchy:

1.

Code:

`g=big/2+big*4/big-big+abc/3`

(abc=2.5, big=2, assume g to be a float)

MY ANSWER:

g=2/2+2*4/2-2+2.5/3g=1+2*4/2-2+2.5/3 OPERATION: /

g=1+8/2-2+2.5/3 OPERATION: *

g=1+4-2+2.5/3 OPERATION: /

g=1+4-2+? **2.5/3=8.3333333... HOW DO FLOATS DEAL WITH THIS? THAT'S AS FAR AS I COULD GET WITH THIS ONE.**

2.

Code:

`on=ink*act/2+3/2*act+2+tig`

(ink=4, act=1, tig=3.2, assume on to be an int)

MY ANSWER:

on=4*1/2+3/2*1+2+3.2on=4/2+3/2*1+2+3.2 OPERATION: *

on=2+3/2*1+2+3.2 OPERATION: /

on=2+1*1+2+3.2 OPERATION: /

on=2+1+2+3.2 OPERATION: *

on=3+2+3.2 OPERATION: +

on=5+3.2 OPERATION: +

on=5.0+3.2 OPERATION: +

on=8

3.

Code:

`s=qui*add/4-6/2+2/3+6/god`

(qui=4, add=2, god=2, s is an int)

MY ANSWER:

s=4*2/4-6/2+2/3+6/2s=8/4-6/2+2/3+6/2 OPERATION: *

s=2-6/2+2/3+6/2 OPERATION: /

s=2-3+2/3+6/2 OPERATION: /

s=2-3+0+6/2 OPERATION: /

s=2-3+0+3 OPERATION: /

s=-1+0+3 OPERATION: -

s=-1+3 OPERATION: +

s=2

4.

Code:

`s=1/3*a/4-6/2+2/3*6/g`

(a=4, g=3, s is an int)

MY ANSWER:s=1/3*4/4-6/2+2/3*6/3s=0*4/4-6/2+2/3*6/3 OPERATION: /

s=0/4-6/2+2/3*6/3 OPERATION: *

s=0-6/2+2/3*6/3 OPERATION: /

s=0-3+2/3*6/3 OPERATION: /

s=0-3+0*6/3 OPERATION: *

s=0-3+0*6/3 OPERATION: *

s=0-3+0/3 OPERATION: /

s=0-3+0 OPERATION: -

s=-3+0 OPERATION: +

s=-3

Thanks for your help, everyone.