This handy Spectrum Math Grade 4 Answer Key Chapter 4 Pretest provides detailed answers for the workbook questions.
Spectrum Math Grade 4 Chapter 4 Pretest Answers Key
Multiply.
Question 1.
a.
Answer:
Multiply the given number 7 with 8 by following the below procedure and the result 56 as shown below.
b.
Answer:
Multiply the given number 25 with 3 by following the below procedure and the result 76 as shown below.
c.
Answer:
Multiply the given number 302 with 13 by following the below procedure and the result 3926 as shown below.
d.
Answer:
Multiply the given number 17 with 15 by following the below procedure and the result 255 as shown below.
e.
Answer:
Multiply the given number 10 with 9 by following the below procedure and the result 90 as shown below.
f.
Answer:
Multiply the given number 12 with 12 by following the below procedure and the result 144 as shown below.
Question 2.
a.
Answer:
Multiply the given number 315 with 47 by following the below procedure and the result 14805 as shown below.
b.
Answer:
Multiply the given number 9 with 9 by following the below procedure and the result 81 as shown below.
c.
Answer:
Multiply the given number 91 with 52 by following the below procedure and the result 4732 as shown below.
d.
Answer:
Multiply the given number 32 with 33 by following the below procedure and the result 1056 as shown below.
e.
Answer:
Multiply the given number 403 with 7 by following the below procedure and the result 2891 as shown below.
f.
Answer:
Multiply the given number 93 with 8 by following the below procedure and the result 744 as shown below.
Question 3.
a.
Answer:
Multiply the given number 605 with 40 by following the below procedure and the result 24200 as shown below.
b.
Answer:
Multiply the given number 79 with 21 by following the below procedure and the result 1659 as shown below.
c.
Answer:
Multiply the given number 100 with 22 by following the below procedure and the result 2200 as shown below.
d.
Answer:
Multiply the given number 1219 with 8 by following the below procedure and the result 9752 as shown below.
e.
Answer:
Multiply the given number 117 with 6 by following the below procedure and the result 2691 as shown below.
f.
Answer:
Multiply the given number 49 with 8 by following the below procedure and the result 372 as shown below.
Question 4.
a.
Answer:
Multiply the given number 750 with 23 by following the below procedure and the result 17250 as shown below.
b.
Answer:
Multiply the given number 10 with 10 by following the below procedure and the result 100 as shown below.
c.
Answer:
Multiply the given number 794 with 2 by following the below procedure and the result 1588 as shown below.
d.
Answer:
Multiply the given number 75 with 25 by following the below procedure and the result 375 as shown below.
e.
Answer:
Multiply the given number 11 with 11 by following the below procedure and the result 121 as shown below.
f.
Answer:
Multiply the given number 972 with 3 by following the below procedure and the result 2916 as shown below.
Question 5.
a.
Answer:
Multiply the given number 452 with 92 by following the below procedure and the result 41854 as shown below.
b.
Answer:
Multiply the given number 88 with 22 by following the below procedure and the result 1936 as shown below.
c.
Answer:
Multiply the given number 3211 with 6 by following the below procedure and the result 19266 as shown below.
d.
Answer:
Multiply the given number 66 with 7 by following the below procedure and the result 462 as shown below.
e.
Answer:
Multiply the given number 78 with 73 by following the below procedure and the result 5694 as shown below.
f.
Answer:
Multiply the given number 803 with 16 by following the below procedure and the result 12832 as shown below.
Write the factors of each number. Then, label it prime or composite.
Question 6.
12
Factors
__________
Prime or Composite
__________
Answer:
Given number is 12
From the definition of factors we know factors of a number are nothing but the numbers that divide the given number exactly and leaves no remainder.
Factors of 12 = 1, 2, 3, 4, 6, 12
Prime numbers are the ones that have one and itself as factors.
1 is neither prime nor composite
3 is a prime number
Rest of 2,4,6 and 12 are composite number since it has more than one factor.
Question 7.
11
Factors
__________
Prime or Composite
__________
Answer:
Given number is 11
From the definition of factors we know factors of a number are nothing but the numbers that divide the given number exactly and leaves no remainder.
Factors of 11 = 1, 11
Prime numbers are the ones that have one and itself as factors.
1 is neither prime nor composite
11 is a prime number
Question 8.
20
Factors
__________
Prime or Composite
__________
Answer:
Given number is 20
From the definition of factors we know factors of a number are nothing but the numbers that divide the given number exactly and leaves no remainder.
Factors of 20 = 1, 2, 4, 5, 10, 20
Prime numbers are the ones that have one and itself as factors.
1 is neither prime nor composite
5 is a prime number
Rest of 2,4, 10 and 20 are composite numbers since it has more than one factor.
Question 9.
32
Factors
__________
Prime or Composite
__________
Answer:
Given number is 32
From the definition of factors we know factors of a number are nothing but the numbers that divide the given number exactly and leaves no remainder.
Factors of 32 = 1, 2, 4, 8, 16, 32.
Prime numbers are the ones that have one and itself as factors.
1 is neither prime nor composite
Rest of 2,4, 8,16 and 32 are composite numbers since it has more than one factor.
Solve each problem.
Question 10.
Students set up the chairs for the spring concert at Bethel High School. There were 25 rows with 10 chairs in each row. How many chairs did they set up?
They set up ________ chairs.
Answer:
Number of rows = 25
Number of chairs in each row = 10
Number of chairs set up children=?
= 25 x 10= 250
Therefore, They set up 250 chairs.
Question 11.
The school carnival was a success. The school sold 99 tickets and each ticket was good for 2 rides. How many rides did the school sell?
The school sold ___________ rides.
Answer:
Number of tickets sold = 99
Number of each ticket sold for riding = 2
Number of sold tickets=?
= 99 x 2 = 198
Finally, school sold the 198 tickets.
Question 12.
At the Bead Shop, there are 25 rows of glass beads. If there are 320 glass beads in each row, how many glass beads are in the shop?
There are ___ glass beads in the shop.
Answer:
Number glass beads present in rows = 25
Number of glass beads in each rows = 320
Number of glass beads in shop =?
= 25 x 320= 8000
There are 8000 glass beads in the shop.
Write the equation. Then, solve each problem.
Question 13.
The cafeteria planned to bake 3 chocolate chip cookies for every student in the school. If there are 715 students, how many cookies does the cafeteria need to bake?
The cafeteria needs to bake __________ cookies.
Answer:
Number of students = 715
Number of chocolate chip cookies baked to every student = 3
Number of cookies needed to bake = C = ?
Equation : C = 715 x 3 = 2145
2145 cookies are needed to bake by Cafeteria.
Question 14.
Crystal and Eva have been working 10 hours every week on their oral report on Rosa Parks. If they work on the report for 5 weeks, how many hours will they work on the report?
They will work __________ hours on the report.
Answer:
Number of hours working in a week = 10
Number of hours working in 5 weeks = H = ?
Equation: H = 10 x 5 = 50 hours.
They will work 50 hours.