Factors
List the factors of 24
1, 2, 3, 4, 6, 8, 12, 24
We are playing the multiple game and skip counting by 7. If we are counting to 63, how many people will say a multiple of 7?
9, because 7 x 9 = 63
Choose the numbers below that are divisible by 3:
12, 53, 99, 106, 285, 335, 576, 971
12, 99, 285, and 576
Ray and Margaret went apple picking. Ray picked 6 apples. If Margaret picked 3 times as many apples as Ray, how many apples did Margaret pick?
6 x 3 = 18 apples
True or False: Prime numbers only have 2 multiples: 1 and itself.
FALSE! Prime numbers only have 2 FACTORS. They have an infinite number of multiples.
List all the factor pairs of 42
1 x 42, 2 x 21, 3 x 14, 6 x 7
Do the Chicken Dance!
Back to the Math!
Charles is finding numbers that are divisible by 3. He says that 333 is divisible by 3 because it ends in a 3. Is he correct?
333 IS divisible by 3, but his reason is incorrect. 3 + 3 + 3 = 9. Since 9 can be divided by 3, so can 333.
STRIKE A POSE!
Back to the game!
Don't forget to floss every day!
You know what to do now. (Back to work!)
Which of the numbers below have an EVEN number of factors?
22, 36, 48, 64, 72, 96, 100, 108, 121
22, 48, 72, 96, and 108
List the first 12 multiples of 12.
12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144
Choose the numbers below that can be divided by 6:
15, 36, 52, 94, 108, 123, 206, 414, 603, 555, 834
Any even numbers that have a factor of 3 will also have a factor of 6: 36, 108, 414, and 834
Cara and Lisa went shopping for gifts. Cara spent $12 and Lisa spent $60. Lisa spent ____ times as much as Cara.
60 divided by 12 = 5 times as much.
Which factors of 24 are also factors of 72?
All of them!
(24 x 3 = 72, so all the factors of 24 are also factors of 72)
Jumping Jack Time!
Put those brains to work!
I am skip counting by 5. How many multiples will I say to reach 200?
40. 5 x 20 = 100, so 5 x 40 = 200
True or false: If a number has a factor of 3, it will also have a factor of 9.
FALSE: It's the other way around. All numbers with a factor of 9 will also have a factor of 3.
Proof: 15 and 33 have a factor of 3, but not 9.
The Rainbow School was having a reading contest during the month of November. Eric read for 9 hours that month. Jeremy read for 27 hours that month. Ellie LOVES reading and read for 7 times longer than Eric that month. How many more hours did Ellie read than Eric?
Ellie read 54 more hours.
9 x 7 = 63 total hours Ellie read
63 - 9 = 54 hours more
How much Jeremy read is unnecessary information!
Mr. Thompson's class is skip counting around the room by 11s. What will the 11th person say?
11 x 11 = 121
List the square numbers up to 144
1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144
I am skip counting by a mystery number. The 9th multiple that I say is 72. What am I skip counting by, and what was the 5th multiple?
I am skip counting by 8, because 8 x 9 = 72. The 5th multiple is 40, because 8 x 5 = 40.
Dance Break!
Back to Business!
Alison and Andrew want to collect $144 dollars to donate to the animal shelter. If they each collect $12 per week, how many weeks will it take them to reach their goal?
6 weeks. If their goal is $144, they each need to collect $72. 12 x 6 = 72.
Mrs. Heredia and Ms. Puche were comparing how many pairs of shoes they have. Mrs. Heredia has 12 pairs of shoes. If Ms. Puche has 8 times as many pairs, how many more pairs of shoes does Ms. Puche have than Mrs. Heredia.
12 x 8 = 96. Ms. Puche has 96 pairs of shoes.
96 - 12 = 84. Ms. Puche has 84 more pairs than Mrs. Heredia.