MISSING ADDEND - Addition & Subtraction Word Problems - 1OA4 FREE
Subtraction as Missing Addend Word / Story Problems
1OA4 Understand subtraction as an unknown-addend problem
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Differentiated - Below Level, On Level, Advanced
- Below Level - structured layout with built-in support (model, number sentence frames, etc.); numbers focus on basic facts
- On Level - structured layout with less support; numbers go up to 20
- Advanced - students are responsible for constructing all aspects; numbers go up to 100 and may require un-bundling (regrouping)
Answer Key included
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to see state-specific standards (only available in the US).
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.
Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.