Vocabulary
A number that is multiplied by another number.
Factor.
3 x 8 =
24
Write an expression for the following:
Kim had $5. Ben has 4 times as much money as Kim.
5 x 4
6 x 7 =
42
Go get a drink of water then come back and another question.
Water.
A combination of numbers and operations. OR
A number sentence without an equal sign and answer.
Expression.
$6 x 4 =
$24
Write an expression for the following.
Barbara bought four cartons of Easter eggs. Each carton has 2 rows of 6 eggs.
4 (2 x 6)
8 x 4 =
32
Stand up, do 10 jumping jacks. Then sit back down and answer a question from another column.
Jumping Jacks.
To find the value of an expression by replacing variables with numbers.
Evaluate.
9 x 7 =
63
Write and evaluate an expression for the following:
Lisa is drawing 2 pictures for each of her 5 family members. If each picture has 4 animals in it, how many animals are there in all?
(2 x 5) x 4 = 40
12 x 9 =
108
What is 3 x 10? That is how many seconds you need to run in place. Then sit back down and do a question from another column.
Running in Place.
This property states that the grouping of the factors does not change the product.
Ex: 3 x (6 x 2) = (3 x 6) x 2
Associative Property of Multiplication.
Write an expression for the following:
32 less than 90
90 - 32
Write an expression for the following, then evaluate it.
Pete gives his mom two high-fives every time she wins a game of yahtzee. He also gives her two high-fives every night before bed.
Evaluate the expression if today Pete's mom won 7 games of yahtzee.
Expression: (2 x f) + 2
Evaluation: f=7 so, (2 x 7) + 2 = 16
$11 x 6 =
$66
Close your eyes, put your hand on your stomach and take 5 DEEP breaths. Feel your stomach expand as you breath.
Deep Breathing.
With this property, to multiply a sum, you multiply each addend by the number and add the products together.
Ex: 4 x (1 + 3) = (4 x 1) + (4 x 3)
Distributive Property.
Write an expression for the following:
3 times the sum of 7 and 5.
3 (7 + 5)
Tyler bakes 42 muffins. He gives 4 muffins to each of his three brothers. Then he gives half of the remaining muffins to his neighbor. How many muffins does Tyler have left?
42 - (4 x 3) [divide by] 2
42 - 12 = 30
30 [divide by] 2 = 15
12 x 8 =
96
Go get a drink of water then come back and another question.
Water.