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Sagot :
Answer:
3
Step-by-step explanation:
7-4 = 3
4 = 1 + 1 + 1 + 1
So...
Substitute 4 with 1+1...
7 - 1 - 1 - 1 -1
Get rid of the ones one at a time:
6 - 1 - 1 - 1
5 - 1 - 1
4 - 1
3
Mark brainliest please!
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