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Mental Subtraction with 3-digit numbers (3rd grade math)

To subtract a single-digit number from a three-digit number, we can subtract in parts, or use easier, similar problems. I give several examples of these.

These little puzzles are actually equations with an unknown. Here we use a shape for the missing number. Put your thinking caps on and solve these with me!

See also

Make Number Sentences — a fun game

Three-digit subtraction word problems and a puzzle

Math Mammoth Grade 3 curriculum

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