Vocabulary
What does evaluate mean?
A. To find the value of a numerical expression.
B. A special set of rules which gives the order in which calculations are done in a numerical expression.
C. A mathematical phrase that uses only numbers and operation signs.
A. To find the value of a numerical expression.
What is the phrase that helps us remember the order of operations?
PEMDAS- Please excuse my dear aunt sally.
Write a numerical expressions to model the words.
Add 5 and 25, and then multiply the sum by 4.
(5 + 25) x 4
Compare the numerical expressions.
9 x (15 - 8)
15 - 8
The expression 9 x (15 - 8) is nine times as great as 15 - 8.
Which is the value of the numerical expressions
6 + 2 x (8 - 4)
12
What does numerical expression mean?
A. To find the value of a numerical expression.
B. A special set of rules which gives the order in which calculations are done in a numerical expression.
C. A mathematical phrase that uses only numbers and operation signs.
C. A mathematical phrase that uses only numbers and operation signs.
(2 - 1) x 3
Parenthesis
Use parentheses to rewrite the numerical expression
18 + 3 x 6 ÷ 3 to have a value of 12.
(18 + 3 x 6) ÷ 3
Compare the numerical expressions.
3 x (5 - 1)
5 - 1
3 x (5 - 1) is three times as great as 5 - 1
Which is the value of the numerical expression
30 ÷ 5 - (3 + 1)
2
What does order of operations mean?
A. To find the value of a numerical expression.
B. A special set of rules which gives the order in which calculations are done in a numerical expression.
C. A mathematical phrase that uses only numbers and operation signs.
B. A special set of rules which gives the order in which calculations are done in a numerical expression.
What would you do first in the following numerical expression?
8 ÷ 2 x 4
8 ÷ 2
4 x 7 - 2 x 3 to have a value of 60.
4 x (7 - 2) x 3
Write an expression to match each phrase:
3 less than the product of 8 and 3
(8 x 3) - 3
Evaluate the numerical expression.
6 x 4 + 2 x 8
40
What would you do first and second in the following numerical expression?
(8 x 3 - 2) + 7
(8 x 3 - 2) + 7 1st
(24 - 2) + 7 2nd
22 + 7
29
Write a numerical expression for the problem and solve.
John and Jack each have 15 candy bars. They want to share the candy bars they have with their friend Jeff. If John and Jack spit their candy bars equally between themselves and their friend, how many candy bars does each person get?
(15 + 15) ÷ 3 = 10
Compare the numerical expressions.
30 x 5
10 x 5
(8 - 2 x 3) + 20 ÷ 10
4
5 x 3 + (5 - 1 x 2) ÷ 2
5 x 3 + (6 - 1 x 2) ÷ 2
5 x 3 + (6 - 2 ) ÷ 2
5 x 3 + (4) ÷ 2
15 + (4) ÷ 2
15 + 2
17
Write an expression to match each phrase:
4 multiplied by the sum of 2 and 8
4 x (2 + 8)
102 + 5 - (8 x 5)
65