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Your search returned 2 results.
Subject Area: Mathematics (NYS P-12 Common Core)
Grades: Elementary, 1st Grade
Apply properties of operations as strategies to add and subtract.3 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.)
Subject Area: Mathematics (NYS P-12 Common Core)
Grades: Elementary, 1st Grade
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.
Your search returned 2 results.
