0
you do 21 divided by 7, which is obviously 3.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
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 numbers do you multiply to get 21?
1, 3, 7, 21: 1 x 21, 3 x 7
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 is the highest common multiply of 21 14 and 49?
7
How do you find the LCM of 10 and 21?
Factor them. 2 x 5 = 10 3 x 7 = 21 No factors in common. Multiply them. 2 x 3 x 5 x 7 = 210
What are the common factors of 21 and 28?
the greatest common factor is 7, because 21 divided by 7 is 3, 28 divided by 7 is 4 and 56 divided by 7 is 8.
How do you find the least common multiple of 10 and 7?
Multiply them together.
How do you find the least common multiple of 6 and 7?
Multiply them together.
How do you find least common multiple of 7 and 8?
Multiply them together.
How do you find the least common multiple of 4 and 7?
Multiply them together.
How do you find the least common multiple of 7 and 11?
Multiply them together.
How do you find the common multiples of 7 and 11?
Multiply them together. Multiply that total by successive counting numbers.
How did you find the least common multiple of 7 and 9?
Multiply them together.
What number does 14 and 21 go into?
To find all common multiples of two numbers, you first need to split them into their prime factors: 21 = 3x7 14 = 2x7 The next step is to identify any common factors. In this case, both numbers have 7 as a factor so we can discard one 7. Take every other prime factor (2, 3 and 7) and multiply them together to get the LCM: 2x3x7=42 To find any other common multiple, you simply multiply this number by an integer (2,3,4...). By doing this, you find that the first few numbers that 21 and 14 both go into are: 42, 84, 126, 168...
