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Solving Mixed Problems within 100 (+ -)
- Practice subtracting two-digit numbers to find how many are left or how many more are needed.
- Decide whether to add or subtract based on the symbols in the problem.
- Work carefully with place value so the ones and tens stay in the right spots.
- Practice finding a missing number in addition and subtraction equations
- Get comfortable seeing the unknown in different spots — at the beginning, middle, or end of an equation