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The fact family of 0, 0, and 4 would include the addition and subtraction equations: 0 + 0 = 0, 0 + 4 = 4, and the subtraction equation: 4 - 0 = 4.
The fact family of 3 and 9 3+9 9+3 9-3 3-9
1 & 3
write three numbers that makes a fact family
The operation, division, is not symmetric. There is a number, x, such that x*3 = 0. In fact x is also 0. But there is no number, y, such that y*0 = 3.