Multiplication

Mastery

MULTIPLY BY 1

MULTIPLY BY 10

MULTIPLY BY 5

MULTIPLY BY 2

MULTIPLY BY 4

MULTIPLY BY 8

MULTIPLY BY 3

MULTIPLY BY 6

MULTIPLY BY 9

MULTIPLY BY 7

Multiply times zero

Rule: Any number times zero is equal to zero.

Multiply times 1

Rule: Any number times 1 is equal to the same number.

Multiply times 5

Rule: Count forward or backward by 5's by a math fact you know for sure.

Strategy: 5 is half of 10, so the product of a fives fact will be half of the product of a related tens fact.

Multiply times 10

Rule: any number times 10 equals the number you started with a 0 in the ones place.

Multiply times 2

Rule: double the number

Multiply times 4

Rule: double double

Strategy: double the number and then double again

Multiply times 8

Rule: double times 4 or double double double

Strategy: times 2 and then times 2 and then times 2 one last time (for example, 6 x 8 = 6 x 4 x 2 = 24 x 2 = 48

Multiply times 3

Rule: any number times 3 is one more group than double

Strategy: 6 x 3 = (6 x 2) + 6 = 12 + 6 = 18

Multiply times 6

Rule: double times 3

Strategy: 7 x 6 = 7 x 3 x 2 = 21 x 2 = 42)

Multiply times 9

Rule: that number times 10 and then take one group away

Strategy: e, 6 x 3 = (6 x 2) + 6 = 12 + 6 = 18

Multiply times 7

Rule: any number times 3 is one more group than double

Strategy: 6 x 3 = (6 x 2) + 6 = 12 + 6 = 18