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Earn +20 ptsQ: How do you find the common multiply of 7 and 21?
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Continue Learning about Math & Arithmetic
What is three-sevenths plus two-thirds?
Find a common denominator. 21 is common. Multiply the fractions to achieve a common denominator of 21. 3/7 + 2/3 = 9/21 + 14/21 = 23/21
What do you multiply to get 21?
1 and 21 3 and 7
What can you multiply to get 21?
You can do 7 times 3 and that will equal 21
What numbers can you multiply to get the number 21?
How about: 3*7 = 21 or 1*21 = 21
What is GCD for 35 and 49?
Find the prime factors of each, and multiply groupings of common factors, as well as individual, ungrouped factors, and you have the LCD (least common denominator): 35 = 5 * 7 49 = 7 * 7 LCD = 5 * 7 * 7 = 245 To get the GCF (greatest common factor), multiply groupings of common factors: GCF = 7
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