Multiplication looks at equally sized groups. Multiplying by two means finding the total of $2$2 equally sized groups and is the same as doubling. Multiplying by four means finding the total of $4$4 equally sized groups and can be found by doubling the number, then double the answer.

Apply

Question 1

$2\times8$2×8

Question 2

$4\times8$4×8

Question 3

$7\times4$7×4

Remember!

Double means "multiply by $2$2."
To multiply a number by $4$4, you can use the Double, Double strategy. That means, double the number, then double the answer.

Outcomes

3.OA.C.7

Fluently multiply and divide within 100. By the end of grade 3, know from memory all multiplication products through 10 x 10 and division quotients when both the quotient and divisor are less than or equal to 10.

PRACTICE: Multiply 2 and 4

Practice