Three numbers, four sentences — how + and −, or × and ÷, undo each other
Set the two numbers with − and +, then read the four facts of their family.
First number
Second number
The two small numbers combine to make the top number.
The four facts · Whole = 8
3 + 5 = 8
5 + 3 = 8
8 − 3 = 5
8 − 5 = 3
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