Respuesta :

a half of 4 is 2 because 2+2=4
Seeing from a comment from you: choices are 4-3=1. 7-4=3. 7-3=4. 4+3=7 
Since you can add 3 to each side on 4-3=1 to make it 4=1+3, then the first option shows a way to take 4 apart.  The others are a way to take 7 apart.

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