Students practice writing subtraction sentences based on basic word problems. They can use double ten frames and number lines to help them then subtract within 20. The last two pages students can complete on their own.
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Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.