3 years ago

What addition double fact can help you find 4+3

2 answers:

8 0

Forget all the facts 4+3=7 If the teacher making you find facts tell her she is wasting everyone times because you are never gonna use addition facts in real life.

Kamila [148]3 years ago

5 0

I think I know what you're asking. You know that 4+4=8 so you can just subtract 1 from that to get 7.

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$\dfrac{20}{16}=\dfrac{20:4}{16:4}=\dfrac{5}{4}\\\\\dfrac{5}{4}=\dfrac{x}{80}\ \ \ \ |cross\ multiply\\\\4x=5\cdot80\\\\4x=400\ \ \ \ |divide\ both\ sides\ by\ 4\\\\\boxed{x=100}$

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