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Multiplication by 9

Upper elementary grade learners can easily multiply by 9 using the conventional right to left method. But there are simpler ways to know the correct answer. We know that a number is divisible by 9 if the sum of it…

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Divisibility by 4

Divisibility tests are often included in math competitions like the 2nd MATH-Inic Vedic Mathematics National Challenge which will held online on April 24, 2022. Most grade 5 learners know that in determining the divisibility of a number by 4, only…

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Multiplication by 4

Doubling a two-digit number is the only skill needed to answer this question mentally in 3 seconds. Since 4 = 2 x 2. Young children who still do not know their times 4 table can use doubling twice to get…

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Multiplying by 11

Do you know that multiplying by 11 is easier than multiplying by 2? That is the reason that in my best-selling book 25 Math Short Cuts, I discussed multiplication by 11 in Chapter 4, ahead of multiplication by 2 which…

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