Practice with the help of Spectrum Math Grade 5 Answer Key Chapter 7 Pretest regularly and improve your accuracy in solving questions.
Spectrum Math Grade 5 Chapter 7 Pretest Answers Key
Check What You Know
The table provides x coordinates. Complete the table with 2 sets of y coordinates. Then, complete the graph based on the table.
Question 1.
Answer:
Explanation:
Add 1 and Add 3 to the given numbers in the table as shown in the above table,
then mark the points on the graph to plot the blue lines, as as shown in the above pictures.
Find the value of each expression.
Question 2.
a. (8 + 2) × 3 = _____________
Answer:
30
Explanation:
As we know that,
Parentheses, brackets, and braces can be used to show that one part of a mathematical expression should be solved before the rest of the equation.
Calculate the numbers in parentheses first.
(8 + 2) × 3
= (10) × 3
= 30
b. (5 + 3) + (6 × 2) = ______________
Answer:
20
Explanation:
As we know that,
Parentheses, brackets, and braces can be used to show that one part of a mathematical expression should be solved before the rest of the equation.
Calculate the numbers in parentheses first.
(5 + 3) + (6 × 2)
= (8) + (12)
= 20
Question 3.
a. [(3 × 2) – 1] – 2 = _____________
Answer:
3
Explanation:
As we know that,
Parentheses, brackets, and braces can be used to show that one part of a mathematical expression should be solved before the rest of the equation.
When a problem has a combination of parentheses, brackets, and braces, work the problem from the inside out.
Then calculate the numbers in parentheses.
[(3 × 2) – 1] – 2
= [(6) – 1] – 2
= 5 – 2
= 3
b. {[5 × (1 + 1) + 5] – 6} × 2 = _____________
Answer:
18
Explanation:
As we know that,
Parentheses, brackets, and braces can be used to show that one part of a mathematical expression should be solved before the rest of the equation.
When a problem has a combination of parentheses, brackets, and braces, work the problem from the inside out.
Then calculate the numbers in parentheses.
{[5 × (1 + 1) + 5] – 6} × 2
= {[5 × (2) + 5] – 6} × 2
= {10 + 5] – 6} × 2
= {15 – 6} × 2
= 9 x 2
= 18
Question 4.
a. [(6 × 4) – 4] ÷ 4 = _____________
Answer:
5
Explanation:
As we know that,
Parentheses, brackets, and braces can be used to show that one part of a mathematical expression should be solved before the rest of the equation.
When a problem has a combination of parentheses, brackets, and braces, work the problem from the inside out.
Then calculate the numbers in parentheses.
[(6 × 4) – 4] ÷ 4
= [24 – 4] ÷ 4
= 20 ÷ 4
= 5
b. (2 × 3) + (5 × 2) = ____________
Answer:
16
Explanation:
As we know that,
Parentheses, brackets, and braces can be used to show that one part of a mathematical expression should be solved before the rest of the equation.
Calculate the numbers in parentheses first.
(2 × 3) + (5 × 2)
= (6) + (10)
= 16
Question 5.
a. 5 + 2 × 45 = ______________
Answer:
95
Explanation:
According to the DMAS rule,
First Division, Multiplication, Addition, and at the end Subtraction.
5 + 2 × 45
= 5 + 2 × 45
= 5 + 90
= 95
b. 88 – 7 × 8 = _____________
Answer:
32
Explanation:
According to the DMAS rule,
First Division, Multiplication, Addition, and at the end Subtraction.
88 – 7 × 8
= 88 – 7 × 8
= 88 – 56
= 32
Question 6.
a. 98 + (5 × 4) ÷ 2 = _____________
Answer:
108
Explanation:
According to BODMAS rule,
the brackets have to be solved first then Division, Multiplication, Addition, and at the end Subtraction.
98 + (5 × 4) ÷ 2
= 98 + (5 × 4) ÷ 2
= 98 + (20) ÷ 2
= 98 + 10
= 108
b. (9 – 6) × 8 = _____________
Answer:
24
Explanation:
According to BODMAS rule,
the brackets have to be solved first then Division, Multiplication, Addition, and at the end Subtraction.
(9 – 6) × 8
= 3 x 8
= 24
Question 7.
a. 43 + (9 × 2) = ____________
Answer:
61
Explanation:
According to BODMAS rule,
the brackets have to be solved first then Division, Multiplication, Addition, and at the end Subtraction.
43 + (9 × 2)
= 43 + (9 × 2)
= 43 + 18
= 61
b. 66 ÷ (22 – 11) = ____________
Answer:
6
Explanation:
According to BODMAS rule,
the brackets have to be solved first then Division, Multiplication, Addition, and at the end Subtraction.
66 ÷ (22 – 11)
= 66 ÷ (11) = 6
Write the expression for each phrase.
Question 8.
six more than the product of 2 and 3
Answer:
6 + (2 x 3) =
Explanation:
Given,
six more than the product of 2 and 3
The product of 2 and 3 = 2 x 3 = 6
expression of six more means 6 to be added to product of 2 x 3
6 + (2 x 3) = 6 + 6 = 12
Question 9.
eight divided by the sum of 3 and 1
Answer:
8 ÷ (3 + 1)
Explanation:
Given,
eight divided by the sum of 3 and 1
The sum of 3 and 1 is 3 + 1 = 4
expression of eight divided by the sum of 3 and 1 is written as
8 ÷ (3 + 1) = 8 ÷ 4 = 2
Question 10.
four more than the quotient of 25 divided by 5
Answer:
4 + 25 ÷ 5
Explanation:
Given,
four more than the quotient of 25 divided by 5
The quotient of 25 divided by 5 is written as, 25 ÷ 5
expression of four more than the quotient of 25 divided by 5 is written as, 4 + 25 ÷ 5
Question 11.
the difference between 21 and the product of 3 and 4
Answer:
21 – (3 x 4)
Explanation:
Given,
the difference between 21 and the product of 3 and 4
the product of 3 and 4 is written as, 3 x 4
expression of the difference between 21 and the product of 3 and 4
21 – (3 x 4)
= 21 – 12
= 9
Write the expression needed and solve each problem. Show your work.
Question 12.
Rachel bought a sandwich for $3.95, a bag of chips for $1 .50, and a drink for $1 .25. The tax was $0.47. She gave the cashier $10.00. How much change should Rachel receive?
Expression: _____________
Rachel should receive _____________ in change.
Answer:
Expression: $10.00 – ($3.95 + $1.50 + $1.25 + $0.47) = $2.83
Rachel should receive $2.83 in change.
Explanation:
Rachel bought a sandwich for $3.95,
a bag of chips for $1.50,
a drink for $1.25.
First add all the three and the total to be subtracted from the $10.00 as below to get the change.
$10.00 – ($3.95 + $1.50 + $1.25 + $0.47) = $2.83
Question 13.
Ms. Garcia bought 3 packs of red notepads, 5 packs of yellow notepads, and 8 packs of green notepads. There were 3 notepads in each package. How many notepads did Ms. Garcia buy in all?
Expression: ______________
Ms. Garcia bought __________ notepads.
Answer:
Expression: 3 x (3 + 5 + 8) = 48
Ms. Garcia bought 48 notepads.
Explanation:
Ms. Garcia bought 3 packs of red notepads,
5 packs of yellow notepads,
8 packs of green notepads.
First add all then multiply with 3 as shown below.
3 x (3 + 5 + 8) = 48