standard_description: Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure.
problem_activity: Stage 1: Two-digit Factors
Required Preparation
Materials to Copy
Blackline Masters
Number Puzzles Mult Stage 1 Recording Sheet

Narrative
Students use the digits 0–9 to make multiplication equations with two-digit factors true. Each digit may only be used one time.


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