The fact family of numbers 1,2, and 3 has two _____ and two ______ equations.
A
plus, plus
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B
addition, subtraction
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C
subtraction, subtraction
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D
addition, addition
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Solution
The correct option is B addition, subtraction The fact family of numbers 1,2, and 3 is made up of two addition and two subtraction equations. 1+2=3 2+1=3 3–2=1 3–1=2