An inverse operation reverses the effect of another operation. Answer is C
U just need to believe in your self and don’t give up even if the questions are hard. Ask for help always even during test the teacher might give u hints. Take your mind of it for about five min to give ur brain a break if your getting overwhelmed. Hope this helps. U got this!!!
Step-by-step explanation:



20 + 5 + 500,000,000 = 500,000,025
500,000,025 - 200,000 = 499,800,025
So Johny has 499,800,025
Tommy has 100,005
And Tommy's sister has 100,020
Hope it helps!