More Mental Addition and Subtraction (3-digit numbers)

We practice adding a single-digit number to a 3-digit number and also subtracting a single-digit number from a 3-digit number, using mental math (I show various strategies). Along the way we also look at which expression or number sentence matches a word problem, make a number pattern, and in the end, solve missing number "puzzles".

See also

Regrouping twice in subtraction

Math Mammoth Grade 3 curriculum

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