If I'm adding 2 separate numbers in my head, I generally do it like this if the answer isn't a multiple of 5 or 10:
23 + 34
20+30=50
3+4=7
50+7=57
However, if I'm doing it on paper, I do it longhand.
Very glad we homeschool our children and they don't have to deal with this Common Core nonsense. We have many different curriculum options available to find and use the one that helps them learn the best.
Sometimes I think Common Core is meant to see to it that American children DON'T learn math. Just another perfect example of why education should be controlled LOCALLY, not nationally.
23 + 34
20+30=50
3+4=7
50+7=57
However, if I'm doing it on paper, I do it longhand.
Very glad we homeschool our children and they don't have to deal with this Common Core nonsense. We have many different curriculum options available to find and use the one that helps them learn the best.
Sometimes I think Common Core is meant to see to it that American children DON'T learn math. Just another perfect example of why education should be controlled LOCALLY, not nationally.
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