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4 cards from this section. Quick, good the night before a test.
What is 5 + 3?
Count up from 5.
What is the identity element in addition?
What number keeps another number the same?
What is the sum of 4 + 5?
Count up from 4 by 5.
True or False: The order of numbers in addition doesn't matter.
Think about how you can switch the numbers.
If you have 15 apples and you add some more to reach a total of 25, how many apples did you add?
Think about the difference to find out how many were added.
Solve for x: (2 + x) + 5 = 12. What is the value of x?
First, simplify the left side.
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