Grade 1 Unit of Study 7: Solve Comparision Problems within 20

In This Unit of Study…

Students will explore solving comparison problems within 20. They will directly model difference unknown comparison problems using objects, drawings, and equations.

B.E.S.T. Benchmarks:

• MA.1.NSO.2.1 Recall addition facts with sums to 10 and related subtraction facts with automaticity. 
• MA.1.AR.1.2 Solve addition and subtraction real-world problems using objects, drawings, or equations to represent the problem. 
• MA.1.AR.2.1 Restate a subtraction problem as a missing addend problem using the relationship between addition and subtraction. 

Overarching Key Concepts:

• Fluency: Use ‘doubles -1’ to recall addition facts within 10
• Solve difference unknown comparision problems within 20
• Solve bigger and smaller unknown comparison problems within 20