Number Bonds to 20 drills (10 questions) WORKSHEET
Suitable for Grades: 1st Grade
CCSS: 1.OA.C.6, 1.OA.D.8
CCSS Description: Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = � – 3, 6 + 6 = �.
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = � – 3, 6 + 6 = �.
Number Bonds to 20 drills (10 questions) WORKSHEET DESCRIPTION
Fill in the missing number in 10 addition questions all of which equal twenty. Perfect number bonds to 20 practice.
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This worksheet is designed for 1st Grade students who are building their foundational addition skills. The focus on number bonds to 20 helps young learners develop automatic recall of these essential math facts. First graders benefit greatly from this type of structured practice as they transition from counting to more fluent calculation strategies.