Multiplication Comparisons
3 x 4 = 12
12 is 3 times as many as 4.
Would you use multiplication or division to solve this problem?
Tessa is selling beaded bracelets. She made $45 selling them. If each bracelet is $5, how many did she sell?
Division! 45 divided by 5 = 9. She sold 9 bracelets for $5 each.
True or False: 3 and 6 are both factors of 30.
Yes because 3 x 10 = 30 and 6 x 5 = 30
True or False: 49 is a multiple of 7
Is 81 prime or composite?
Composite! 9 x 9 = 81
50 is ____ times as many as 5.
10
Ben has 5 comic books. The store has 7 times as many comic books. How many comic books does the store have?
5 x 7 = 35. The store has 35 comic books.
1 x 24 2 x 12 3 x 8 4 x 6
List the first ten multiples of 6 (starting with 6 x 1)
6, 12, 18, 24, 30, 36, 42, 48, 54, 60
Name a prime number from 1-20.
Answers will vary. 2, 3, 5, 7, 11, 13, 17, 19
56
No! 72 is a multiple of 9. 9 is a factor of 72.
True or False: 4 is a multiple of 12.
True or False: 21, 18, and 49 are all composite.
True. They all have more than 2 factors.
32 is 4 times as many as 8
32 = 4 x 8 or 4 x 8 = 32
David won 8 rounds of Apple Math. That is 2 times as many rounds as Theo won. How many rounds did Theo win?
8 divided by 2 = 4. Theo won 4 rounds.
Is 3 a factor of 33? Explain why or why not.
Yes, because 3 x 11 = 33.
Name 3 multiples of 8. Prove they are multiples.
Answers will vary. 8, 16, 24, 32, 40, 48, 56, 64, ...
Is 55 prime or composite?
Composite because it has more than 2 factors. 1 x 55, 11 x 5.
What number makes both of these statements true:
____ times as many as 4 is 36.
3 times as many as 3 is ____ .
Olivia ran 27 miles this week. She ran 3 times as many miles as her dad. How many miles did her dad run?
27 divided by 3 = 9. Her dad ran 9 miles.
List all of the possible arrays or factor pairs you can make for 32.
1 x 32 2 x 16 4 x 8
Is 208 a multiple of 2? Explain why or why not.
Yes, because 208 is an even number.
Is 31 prime or composite?
Prime, because its only factors are 1 and 31.