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Nikhilam or base multiplication

This question was given in the 2nd MATH-Inic Vedic Mathematics National Challenge held online last April 30, 2022, which drew 568 participants from all over the Philippines. Anyone who has a working knowledge of of Nikhilam or base multiplication can…

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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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Dividing by 5

Mastering the doubling operation will enable us to divide by 5 easily. This technique is well discussed in Chapter 9 of our best-selling book “25 Math Short Cuts” Since 5 is equal to 10/2, dividing by 5 is the same…

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Multiplication by 5

Most of us, especially those who know only the conventional right to left method of multiplication would pick choice a: 132,231 x 5. This is because the multiplier is composed of small digits. But if you have read our Math…

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Halving

Dividing a number by 2 is also called halving. This is a very important skill that all students should develop early. Halving can be used also in dividing by 4 and by 8 and also in multiplying by 5, 25…

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