Believe it or not, THERE IS a quick way to multiply two numbers together when both numbers are “teen” numbers. In other words, you can do a problem like 14 x 18 fast and just in your head. Here’s how ….
APRIL’S PROBLEM: What provides a better fit? A square peg in a round hole, or a round peg in a square hole? How well does each peg fit in its respective hole? To provide a complete answer, express the “fit” of each plug as a percentage. To find this percentage, divide the area of the […]
QUESTION: Is there a particular order that is most beneficial to learning times tables? For example, I have heard that learning 1, 5, 10, 11, 2, 4, 8, 12, 3, 6, 9 is a good order. What say you? MY REPLY: There are many “schools of thought” on what makes the best order for teaching […]
QUESTION: I have been asked to help my grandson memorize the addition tables. If I ask him what is 8 + 5, I watch him doing it in his head. He gets the right answer but takes a long time, which may hurt him later when he is introduced to multiplication. Do you have any […]
Isn’t it great when kids ask good questions? (Rhetorical question, that, of course.) I got a good question today, about factoring. I was showing this student how to factor by taking out the GCG, and he asks me, “So what’s the difference between factoring and dividing?” You see, we had been using dividing when factoring […]
If curiosity killed the cat, the cat took one too many tests Today I tutored two girls … with two radically different levels of curiosity The first girl, an eleventh grader, taking Algebra 2. The second, a fifth grader, working on elementary school math. The older girl was studying logarithms. I started to try to […]
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