3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.
3x7 = 21
To find 6x7 using 3x7, you can simply double the result of 3x7. This is because multiplication is distributive over addition, meaning that multiplying a number by a sum is the same as multiplying the number by each addend and then adding the products. In this case, 6x7 can be thought of as (3+3)x7, which equals 3x7 + 3x7, or 21 + 21, which equals 42.
-21
21
3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.
2x7 = 14 x7 = 7 3x7 = 3*7 = 21
3x7 = 21
3, 7, 21. 3x7 is the only equation that equals 21, and so these are the only factors of 21.
Factors are numbers you can multiply together to get another number. 21: (1, 21) (3, 7)
-21
21
3x7
3x7=21 , 1x21=21..
The prime factorization for 21 is 3x7.
22
21