Computation and Estimation
1.CE.9
1st Grade · SOL (VA)
Standard
Apply properties of operations as strategies to add and subtract.2 Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
Study materials
Parent guide, study guide, practice problems, review, and practice test for this standard.
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Interactive practice
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Quiz
Multiple-choice questions with instant feedback
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Type answers and check them
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Mixed quiz
Harder mixed review for this standard