Q&A for How to Divide Odd Numbers by 2

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How can I divide numbers easily without computation?

Grace Imson, MA
Math Instructor, City College of San Francisco
Grace Imson is a math teacher with over 40 years of teaching experience. Grace is currently a math instructor at the City College of San Francisco and was previously in the Math Department at Saint Louis University. She has taught math at the elementary, middle, high school, and college levels. She has an MA in Education, specializing in Administration and Supervision from Saint Louis University.

Grace Imson, MA

Math Instructor, City College of San Francisco

Expert Answer

To divide numbers easily, it's essential to have a solid foundation in multiplication. Memorizing the multiplication table is crucial, and your familiarity with multiplication lays the groundwork for efficient division. When approaching a division problem, such as 20 divided by 5, it's helpful to rephrase it as "How many 5s are inside 20?" This formulation prompts mental calculation and aids in visualization. Another strategy is to envision dividing a set of 20 items into groups of five, fostering a tangible understanding of division. Visualization plays a significant role in comprehension, especially for children learning division, as it helps them grasp the concept more effectively. By combining a strong grasp of multiplication tables with clear, visual explanations of division concepts, individuals can approach division problems with confidence and ease.

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Question

What is 41 divided by 2?

Linnie

Top Answerer

41 divided by 2 is 20.5. 41 = 40 + 1, so you could attempt this problem by saying that 40/2 is 20 and 1/2 is 0.5. Adding the two gives you 20.5.

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What is 81 ÷ 4?

I_l1ke_gam3s

Community Answer

81/4 can be thought of as 80/4 + 1/4. 80/4 = 20. 1/4 = 0.25. 20 + 0.25 = 20.25 or 20¼.

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What is 2 divided by 7?

Community Answer

2/7 = 0.2857. That's an irrational number, so there is no exact answer.

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What is 43 divided by 2?

Community Answer

43/2 can be expressed as 42/2 + 1/2, which is 21 + 0.5 or 21.5.

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What is 99 divided by 4?

Community Answer

If you want to use a method similar to what is shown in the article above, you could divide 100 by 4, then divide 1 by 4, and finally subtract the second quotient from the first. In other words, (100 / 4) - (1/4) = (25) - (1/4) = 24 3/4 or 24.75.

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Can an even number be divided by 2?

I_l1ke_gam3s

Community Answer

An even number is always divisible by 2. You will always get a even, whole number back.

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