Word Problems
There are 3 feet in 1 yard. How many feet are in 6 yards?
18 feet are in 6 yards.
Name each factor pair that you can break 3 into when using known facts to solve unknown multiplication facts.
2, 1
Which is the missing factor:
10 x (4 x 6) = (10 x __) x 6
For double points: What is the solution to 10 x 4 x 6?
4 is the missing factor.
The solution is 240.
5 x 8 = (5 x 4) + (5 x 4)
Distributive Property of Multiplication
Review:
Skip count by 2s ten times!
2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Shelly has 6 friends over. She is serving munchkins. She wants each friend to have 3 munchkins. How many munchkins should she prepare to serve?
Shelly should prepare to serve 18 munchkins.
Name each factor pair that you can break 4 into when using known facts to solve unknown multiplication facts.
1, 3
2, 2
Rewrite this multiplication sentence using the associative property:
4 x (8 x 9)
(4 x 8) x 9
1 x 0 = 0
Zero Property of Multiplication
36
Joe bought 24 clementines.
Name each factor pair that you can break 6 into when using known facts to solve unknown multiplication facts.
1, 5
2, 4
3, 3
What is another way to write 8 x 5?
1. (4x4) + (2x3)
2. (8x5) +(1x5)
3. (5x5) + (3 x5)
4. (4x5) + (3x5)
Show work as proof.
3. (5x5) + (3 x5)
25 + 15 = 40
213 x 1 = 213
Identity Property of Multiplication
Review:
Skip count by 5s ten times!
5, 10, 15, 20, 25, 30, 35, 40, 45, 50
Mark was arranging his sports balls. He laid out 8 rows of balls. In each row, there were 7 balls. Use this array to figure out how many balls he had.
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
Mark had 56 sports balls.
Name each factor pair that you can break 7 into when using known facts to solve unknown multiplication facts.
2, 5
3, 4
What is the missing factor?
3 is the missing factor.
1 x (2 x 3) = (3 x 1) x 2
Commutative Property of Multiplication
What is the product of 2 x 3 x 4?
24
The mailman was arranging his boxes. He made two separate areas for laying out his boxes. Each area had 5 rows of boxes and 6 boxes in each row. How many boxes did the mailman have?
The mailman had 60 boxes.
Name each factor pair that you can break 8 into when using known facts to solve unknown multiplication facts.
1, 7
2, 6
3, 5
4, 4
8 x 6 = (__ x 6) + (5 x 6)
Which of the following is not an acceptable way to rewrite 6 x 8? Explain why.
1. (5 x 4) + (1 x 4)
2. (3 x 8) + (3 x 8)
3. (6 x 6) + (6 x 2)
4. (4 x 8) + (2 x 8)
1. (5 x 4) + (1 x 4)
This is not equal to 6 x 8 because #1 equals 24, and 6 x 8 is 48, so they are not equal. You can also tell because either the first or second factor in the two new facts would have to be the same as the original fact.
(5 x 4) x 3 = 5 x (4 x 3)
Associative Property of Multiplication
Explain what using known facts to solve a multiplication problem means.
Answers will vary.