Multiplicative Comparison
Write the multiplicative comparison equation.
Twenty-one is seven times as many as three.
7 x 3 = 21
Solve. Angie has 28 coins. Angie has 4 times as many coins as Scott has. How many coins does Scott have?
7 coins
What are factors?
The numbers you multiply to get another number.
What are multiples of a number?
Numbers you say when you skip count. Or a number that can be divided by another number without a remainder.
What is a prime number?
A number that only has two factors (or one factor pair).
Write the equation.
Nine times as many of six is fifty-four.
9 x 6 = 54
Yoshi bought 25 stamps. This is 5 times the number of postcards that Mario bought. How many postcards did Mario buy?
5 postcards
What are all the factors of 16?
1,2,4,8,16
List the first five multiples of 5.
5, 10, 15, 20, 25
What is a composite number?
A number that has more than two factors (or more than one factor pair).
Write the equation
Sixteen is eight times as many as two
8 x 2 = 16
Jessica has 16 stickers. Jessica has 2 times as many stickers as Taylor has. How many stickers does Taylor have?
8 stickers
What are all the factors of 28?
1, 2, 4, 7, 14, 28
List the first five factors of 6.
6, 12, 18, 24, 30
Is the number 2 prime or composite?
Prime
Write the equation
Five times as many as five is twenty-five.
5x5=25
Joshua picked 24 apples. This is 3 times the number of apples that Carly picked. How many apples did Carly pick?
8 apples
What are all the factors of 30?
1, 2, 3, 5, 6, 10, 15, 30
List the first five multiples of 11?
11, 22, 33, 44, 55?
Which of the following numbers are composite?
83, 64, 27, 31, 21
64, 27, and 21
Write the equation
Thirty-six is four times as many as nine.
4 x 9= 36
Diane bought 81 empanadas. This is 9 times as many as Steve bought. How many empanadas did Steve buy?
9 empanadas
What factors do the numbers 18 and 24 have in common?
18: 1, 2, 3, 6, 9, 18
24: 1,2,3,4,6,8,12,24,
They have 1,2,3, and 6 in common.
List the first five multiples of 50.
50, 100, 150, 200, and 250
Which of the following numbers are prime?
13, 27, 72, 2, 41, 84
13, 2, and 41