Multiplication
Division
Multiplication Strategies
Division Strategies
Unknown Factors & Divisors
100
There are three boxes of toy kittens. There are three kittens in each box. Which of the following describes the total amount of kittens? A. 9 kittens B. 6 kittens C. 3 x 3 = 9 D. 3 + 3 = 6
A and C
100
Miss Cannon hiked 36 miles in 4 days. She hiked the same amount of miles each day. How many miles did she hike each day? Write a division sentence you would use to solve. Show a strategy to solve.
36 / 4 = 9 miles Skip counting, draw an array with 36 total items and 4 rows, repeated subtraction, using a known fact, and other strategies are acceptable but it must be written on your board.
100
Paige has 60 flyers she organized into piles. There are some in each pile. She has 10 piles. The division equation is 60 / 10 = ? Write a related fact you can use to solve this question.
10 x 6 = 60 or 6 x 1 = 6 (Bonus points if you can describe the next step)
100
Hailey sees the question 90 / ? = 10. She thinks "1 x 9 = 9, so 10 x 9 must = 90. The missing divisor is 10. ? = 10." Which two strategies did she use? A. Use a related multiplication fact B. Use a multiplication table C. Multiply by 10 D. Skip count
A & C
100
45 seconds to answer: 5 x ? = 25
5
200
Which number represents the unknown factor below? Name the property of multiplication that this equation demonstrates. 8 x ? = 0
0; The Zero Property of Multiplication
200
Which number sentence is true? A. 0 / 3 = 3 B. 0 / 3 = 1 C. 3 / 1 = 3 D. 3 / 3 = 1
C and D
200
If I have the equation 8 x 2 = ? and I draw the following to solve, what strategy am I using? @@@@@@@@ @@@@@@@@ A. Use a known fact B. Double a known fact C. Draw an array D. Skip count
C
200
Jack has a story problem that asks him to find 80 / 5 = ?, He takes out a multiplication chart, traces the row of multiples of fives until he finds 80. Then he traces the column up from 80 to find the quotient is 16. What is the name of the strategy he used?
Use a multiplication chart.
200
40 seconds to answer: 27 / ? = 3
9
300
Erich bought 5 posters from a bookstore. Each poster costs $10. Which of the following describes how much money he spent? A. $15 B. 5 x $10 = $50 C. $10 x 5 = $50 D. @@@@@@@@@@ @@@@@@@@@@ @@@@@@@@@@ @@@@@@@@@@ @@@@@@@@@@
B, C, and D
300
Morgan has 12 dolls. She put an equal number of dolls on each shelf. How many dolls are on each shelf? Write an equation and solve.
12 / 2 = 6 dolls
300
Mrs. Gazda sees the equation 4 x 5 = ? To solve, she drew four circles and put five dots in each circle. Which strategy did she use? A. Draw a picture B. Make equal groups C. Draw an array D. Use a known fact
A and B
300
Danna wants to share 80 cookies with 40 third graders. She draws 40 circles and puts one dot in each circle at a time until she gets to 80. What is this strategy called? A. Draw an array B. Partition C. Use a related fact D. Multiply by 10
B
300
30 seconds to answer: 8 x ? = 32
4
400
See screen shot.
24 pipe cleaners
400
Jayce is hanging 12 pictures. There are 4 pictures in each row. Which of the following expressions can Jayce use to find out how many rows he needs to hang? A. 12 x 4 B. 12 / 4 C. 12 + 4 + 4 + 4 D. 12 - 4 - 4 - 4
B and D
400
When Isaak sees, " 8 x ? = 40" he thinks, "8, 16, 24, 32, 40" and then counts to see that 40 is the fifth multiple of 8. He writes down "? = 5." Which strategy did he use? A. Use patterns B. Use a known fact C. Skip Count D. Draw a picture
A and C
400
Isabella made cake for our class. The cake is split into 42 pieces. We have 21 students. She walks around and gives each person one piece of cake at a time until all the pieces are gone. What is this strategy called?
Partition or use a model
400
30 seconds to answer 60 / ? = 5
12
500
Ethan wants to check the division problem below. 6 / 3 = 2 Which of the following inverse operations could he use? A. 2 + 3 = 5 B. 3 + 3 = 6 C. 2 x 3 = 6 D. 3 x 2 = 6
C and D
500
Emelia has 21 charms. She wants to share them with friends and keep some for herself. If each person gets three charms, what is the greatest amount of friends that could she equally share them with? Write an equation and solve.
21 / 3 = ? 21 / 3 = 7 Since she wants to keep some for herself, she can share with 6 friends.
500
If I see the fact 110 x 14, what strategies would I be using if I first found the answer to 11 x 7?
Double a known fact and multiply by 10
500
KC sees the question 54 / 9 = ?. To find the answer, he draws the following. Name the strategies he used. @@@@@@ @@@@@@ @@@@@@ @@@@@@ @@@@@@ @@@@@@ @@@@@@ @@@@@@ @@@@@@ 9 x 6 = 54
Draw an array Write a related multiplication sentence
500
15 seconds to answer: 80 / ? = 4
20
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