Problem: If Jo has 90 cards and June has 40, then Kayla takes 30 cards from everyone, how many do they have left?
The keyword "takes" or "take away" implies that we are subtracting. If I had 5 cookies, and you took 2 away, I now have 3. Or, 5 - 2 = 3.
Step 1: Subtract 30 cards from Jo and June
Jo = 90 cards
June = 40 cards
90 - 30 = 60 cards (Jo)
40 - 30 = 10 cards (June)
To find how many they have remaining together, you can add the number of cards that Jo has to the number of cards that June has.
Jo = 60 cards
June = 10 cards
In total = 60 + 10 = 70 cards
Hope this helps!! :)