1.OA.C.6 Worksheets: Add and Subtract Within 20
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1.OA.C.6 (Operations and Algebraic Thinking): Add and subtract within 20, using strategies like making ten and doubles.
About this standard
Fluency is expected only within 10 by the end of first grade; for sums up to 20 children may still use a strategy. Strategies such as making ten, doubles and using a related addition fact matter as much as memory. Start with Addition Within 10, then Doubles and Near Doubles Addition; second grade fluency is in 2.NBT.B.5.
Worksheets for 1.OA.C.6
Number Bonds to 20
Addition Within 10
Subtraction Within 10
Doubles Facts to 20
Doubles and Near Doubles Addition
Subtraction on a Number Line
Make a Ten to Add
Make a Ten to Subtract
Dice Addition
Addition Within 20
Subtraction Within 20
Addition and Subtraction Within 20
Fact Families Within 10
Fact Families Within 20
Related Addition and Subtraction Facts
Mixed Addition and Subtraction Within 10
Color by number
Fish: Addition Within 10
Flower: Subtraction Within 10
Pine Tree: Addition and Subtraction Within 10
Apple: Addition Within 20