Index arithmetic

 
Here are some numbers written in index form.
Simplify each of the following and write as single powers. 
Do not calculate the answer. Example: 5 × 5 = 5
 
a) 83 × 84
 
 = __________
 
b) 56 × 5–3
 
 = __________
 
c) 28 ÷ 23
 
 = __________
 
d) 96 ÷ 98

 = __________
 
e) (75)3
 
 = __________
 
f)
 = __________
 
g)
 
 = __________
 
h) 63 × 36

 = __________