The answer is a fraction in unreduced form, and they still have to factor.) (Alternatively, the students can multiply the first fraction by $\frac$. If one has to stop and tediously factor $42$ and then $48$ and then Working the above addition of fractions is extremely painful So being able to quickly factor smallish denominators is a useful (This is my answer to people who say, "We haveĬalculators now, so why memorize multiplication tables?" Answer:īecause when you see $42$, you need to think $6\times 7$, or you'll Since they don't have their multiplication facts memorized, the numbers $42$ and $48$ mean nothing The first hurdle in adding fractions is that given I have a small gig tutoring 6th and 7th grade "at risk" students. Past that, the next few numbers don't have so many factors.
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