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Common Core State Standard

2.OA.A.1

Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

CCSS: 2.OA.A.1
Make the monkey happy and put the number coconuts on the scale such that the sums match.