"Now that we have calculators, we no longer need log's, so let's cut them out of the high school curriculum." Now our Calc 1 students don't know log's and ask questions like "I got $\ln 1/2$ but the back of the book says $-\ln 2,$ what did to wrong?" Answer: You went to the wrong high school. (Smooth segue into rant:) This is what happens every time someone at one level of math decides that some bit of math isn't useful anymore. The answer is a fraction in unreduced form, and they still have to factor.) There are several alternative names for a multiplication. (Alternatively, the students can multiply the first fraction by $\frac$. Generally, youll use a 12 x 12 times tables grid or a 10 x 10 times tables grid (up to 100 grid). 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 Keeping the advantages of multiplication tables 2 20, we have provided everything about 12 times table in this article. ![]() 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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