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
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.
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.
21