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
Skip count by 9s ten times!
9, 18, 27, 36, 45, 54, 63, 72, 81, 90
Shelly has 6 friends over. She is serving cookies. She wants each friend to have 3 cookies. How many cookies should she prepare to serve?
Shelly should prepare to serve 18 cookies.
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
Give an example of the associative property.
Answers will vary.
What is 9 x 4?
36
Joe bought 3 bags of oranges. Each bag had 8 oranges in it. How many oranges total did Joe buy?
Joe bought 24 oranges.
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
Give an example of the commutative property of multiplication.
Answers will vary.
Skip count by 3s ten times!
3, 6, 9, 12, 15, 18, 21, 24, 27, 30
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.
1, 6
2, 5
3, 4
Solve for b.
12 x b = 48
b = 4
1 x 2 = 2 x 1
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
Sully needs to figure out the fact 19 x 7. What strategy could Sully use to solve?
Please solve the fact.
19 x 7 = (10 + 9) x 7
(10 x 7) + (9 x 7)
70 + 63
133