99 add 20p = 119
99
79
When you add, your answer is the sum.When you subtract, your answer is the difference.
No. If you add 0.01 to 0.1, you get 0.11 If you add 0.01 to 0.99, you get 1.0
99 add 20p = 119
165
99 and -99
99 + 231 = 330
They are 2/99 and 196/99.
9099
674
It is 42
4950
99
-99
79