Question

lets use the associative property to help us solve \\(3 \times 21\\).

complete the equations by breaking \\(21\\) into two smaller factors.

\\(3 \times 21 = 3 \times\\) select factors of 21
\\(3 \times 21 = 9 \times\\)
\\(3 \times 21 =\\)

Explanation:

Factor the number 21

Using the Factoring Numbers knowledge point

$$ 21 = 3 \times 7 $$

Apply the associative property

Using the Associative Property knowledge point

$$ 3 \times 21 = 3 \times (3 \times 7) = (3 \times 3) \times 7 = 9 \times 7 $$

Calculate the final product

Using the Basic Multiplication knowledge point

$$ 9 \times 7 = 63 $$

Answer:

Let's use the associative property to help us solve \(3 \times 21\).

Complete the equations by breaking 21 into two smaller factors.

\(3 \times 21 = 3 \times\) <blank>\((3 \times 7)\)</blank>
\(3 \times 21 = 9 \times\) <blank>\(7\)</blank>
\(3 \times 21 =\) <blank>\(63\)</blank>