Tip: With numbers less than 100, add the tens first and then add the ones. For example: 12 + 16 + 22 = (10 + 10 + 20) + (2 + 6 + 2) = 40 + 10 = 50
Tip: With numbers less than 100, add the tens first and then add the ones.
For example: 12 + 16 + 22 =
(10 + 10 + 20) + (2 + 6 + 2) =
40 + 10 = 50
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