Answer: 9
Step-by-step explanation: its very simple , first take the -2 out of the parenthesis and put is as 10-2+1 which is positive 9 because 10-2=8 and plus 1 is 9.
Answer:

Step-by-step explanation:
Since they have the same denominator (the number on the bottom), you can just subtract the numerators (the numbers on the top). So 3-2 is 1. You always leave the denominator as it is, don't subtract it.
It is the second option, let me know if you got it right
Answer:
one time.
Step-by-step explanation:
30/3=10
10*2=20
the volume of the smaller figure is 20 cubic cm