Multiplicative Comparisons
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
Craig has a twenty dollar bill. He buys six squirt guns for $2 each. How much money did Craig have left?
8 dollars
is 2 a factor of the number 10?
yes
What is a composite number?
A number that has more than two factors (or more than 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
Clementine and Jake make cookies for the school bake sale. Clementine baked 9 cookies. Jake baked 5 times as many cookies as Clementine. How many cookies did they bake altogether?
54 cookies
name the first 3 multiples for the number 5
5,10,15
What is a prime number?
A number that only has two factors (or one factor pair).
Write the equation
Sixteen is eight times as many as two
8 x 2 = 16
Dean has 8 times as many cars as Sam. Sam has 6 cars. How many cars does Dean have?
48 cars
Brayden was playing touch football against Cole. Touchdowns were worth 7 points. Brayden scored 7 touchdowns. Cole scored 9 touchdowns. How many more points did Cole have than Brayden?
Cole had 14 more points than Brayden
what are the factors for the number 6?
1,2,3,6
Which of the following numbers are composite?
83, 64, 27, 31, 21
64, 27, and 21
Write the equation.
Fifty-six is seven times as many as eight.
56 =7x8
Kate has 4 times as many Pokemon cards as Kyle. She has 28 cards. How many cards does Kyle have?
7 cards
Miles has 7 crayons. Carl has 5 times as many crayons as Miles. Kendall has 8 more crayons than Carl. How many crayons does each kid have?
Miles has 7 crayons
Carl has 35 crayons (7x5)
Kendall has 43 crayons (7x5)+8
what are the factors for the number 15?
1,3,5,15
Is the number 2 prime or composite?
Prime
Write the equation.
Fifty-four is four times as many as nine.
54 = 4 x 9
Diane bought 81 empanadas. This is 9 times as many as Steve bought. How many empanadas did Steve buy?
9 empanadas
Henry is putting books on shelves. Each shelf can hold 5 books. He has 28 fiction books and 23 nonfiction books. How many shelves does Henry need?
11 shelves
(10 shelves would be full with 5 books, and 1 shelf would have only 1 book)
What are all of the factors of 36?
1, 2, 3, 4, 6, 9, 12, 18, 36
Which of the following numbers are prime?
13, 27, 72, 2, 41, 84
13, 2, and 41