All the solutions provided in McGraw Hill My Math Grade 5 Answer Key PDF Chapter 5 Check My Progress will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 5 Chapter 5 Check My Progress Answer Key
Check My Progress Page No. 321-322
Vocabulary Check
Draw a line to match each word to its corred place in the number below.
Answer:
Concept Check
Round each decimal to the place Indicated.
Question 6.
8.067; hundredths
Answer:
8.1
Explanation:
By rounding off the decimal number to the place indicated is 8.1
Question 7.
178.03; tens
Answer:
178
Explanation:
By rounding off the decimal number to the place indicated is 178.
Question 8.
7.48; ones
Answer:
7
Explanation:
By rounding off the decimal number to the place indicated is 7.
Question 9.
26.138; tenths
Answer:
26.1
Explanation:
By rounding off the decimal number to the place indicated is 26.1.
Round each decimal to the nearest one. Then add or subtract.
Question 10.
32.9 + 17.2 = ______________
Answer:
50
Explanation:
Given numbers are 32.9 and 17.2
Each decimal to the nearest one is 33, 17.
Add both of them 33 + 17 = 50
Question 11.
7.91 + 21.9 = ________________
Answer:
8 + 22 =30
Explanation:
Given numbers are 7.91 and 21.9
Each decimal to the nearest one is 8, 22.
Add both of them 8 + 22 = 30
Question 12.
Answer:
The answer is 35.
Explanation:
To round a given number to the ones, you have to look at the first digit after the decimal point. If the given digit is less than 5 (1, 2, 3, 4) we don’t have to round up, but if the given digit is 5 or greater (5, 6, 7, 8, 9) we must round up.
Now let us check the given numbers
48.21 to the nearest one = 48.
12.64 to the nearest one = 13
Now subtract the numbers = 48 – 13 = 35
Question 13.
Answer:
30
Explanation:
To round a given number to the ones, you have to look at the first digit after the decimal point. If the given digit is less than 5 (1, 2, 3, 4) we don’t have to round up, but if the given digit is 5 or greater (5, 6, 7, 8, 9) we must round up.
Now let us check the given numbers
107.14 to the nearest one = 107.
76.87 to the nearest one = 77
Now subtract the numbers = 107 – 77 = 30
Question 14.
Answer:
4
Explanation:
Given numbers are 6.239 and 1.750
Now let us check the digits after the decimal point to round off the numbers
6.239 – the given digit is less than 5 (1, 2, 3, 4) we don’t have to round up. So write the number as 6.
1.750 – the given digit is 5 or greater (5, 6, 7, 8, 9) we must round up. So write the number as 2.
Now subtract the numbers = 6 – 2 = 4
Question 15.
Answer:
6
Explanation:
Given numbers are 3.902 and 2.017
Now let us check the digits after the decimal point to round off the numbers
3.902 – the given digit is less than 5 (1, 2, 3, 4) we don’t have to round up. So write the number as 6.
2.017 – the given digit is 5 or greater (5, 6, 7, 8, 9) we must round up. So write the number as 2.
Now add the numbers = 4 + 2 = 6
Problem Solving
For Exercises 16-19, determine whether you need an estimate or an exact answer. Then solve.
Question 16.
Book World receives 12 boxes of books. Each box contains 16 copies of the new best-seller, Norton’s Last Laugh. How many copies of Norton’s Last Laugh does the store receive?
Answer:
192 copies.
Explanation:
No of boxes of books = 12
Each box contains 16 copies of the new best-seller
To find: How many copies of Norton’s Last Laugh does the store receive?
16 × 12 = 192
Question 17.
Students at Tuscan School filled out a survey. The survey showed that of 374 students, 195 speak a second language. How many students speak only one language?
Answer:
179 students.
Explanation:
No of students survey showed = 374
No of students speak a second language = 195
Now find the difference between them
374 – 195 = 179 students.
Question 18.
Pensacola, Florida, gets an average of 64.28 inches of precipitation per year. Key West, Florida, gets an average of 38.94 inches per year. About how many more inches of precipitation does Pensacola get than Key West?
Answer:
25.34 inches.
Explanation:
Average inches of precipitation per year = 64.28 inches
Average inches per year = 39.94
64.28 – 39.94 = 25.34 inches
Pensacola gets 25.34 inches more rain than Key West.
Question 19.
It costs Marc $29.75 a week to feed his dog. About how much does it cost him to feed his dog for 3 weeks?
Answer:
$89.25.
Explanation:
It costs Marc $29.75 a week to feed his dog.
Find: how much does it cost him to feed his dog for 3 weeks?
29.75 × 3 = $89.25
Test Practice
Question 20.
The average price of gasoline in a recent year was $2.38. Which is the price per gallon of gasoline to the nearest tenth of a dollar?
(A) $2.00
(B) $2.30
(C) $2.38
(D) $2.40
Answer:
$2.40
Explanation:
Given,
The average price of gasoline in a recent year was $2.38.
To find: Which is the price per gallon of gasoline to the nearest tenth of a dollar?
The nearest tenth of a dollar is $2.40.
Check My Progress Page No. 347-348
Vocabulary Check
Match each word to its correct definition.
Answer:
Concept Check
Add.
Question 4.
3.15 + 1.2 = _____________
Answer:
4.35
Explanation:
The addition for the given two numbers is 4.35.
Question 5.
68.9 + 7.1 = _____________
Answer:
76
Explanation:
The addition for the given two numbers is 76.
Question 6.
Answer:
6.37
Explanation:
Question 7.
Answer:
44.07
Explanation:
Question 8.
Use properties of addition to find 37 + 58 mentally. Show your steps and identify the properties that you used.
37 + 58 = _____________
Answer:
We used commutative property and associate property. The answer is 95.
Explanation:
To find the sum of 37 + 58 mentally, we could find the sum 30 + 50 = 80 and then the units 80 + 7 + 8 = 85.
But if we have to identify the properties that we used is then we could separate the numbers
30 + 7 + 50 + 8
Now we apply the commutative property
30 + 50 + 7 + 8
Next, apply associate property that is
(30 + 50) + (7 + 8)
Now add each group
80 + 15 = 95
Problem Solving
Question 9.
What is the combined cost of the sweatshirt and hat shown?
Answer:
$44.89
Explanation:
Given,
Cost of sweatshirt = $25.15
Cost of hat = $19.74
Total cost of the items = $25.15 + $19.74 = cc
Question 10.
Francis earned the following scores on his math quizzes: 86, 84, 90. Jillian earned the following scores on her math quizzes: 84, 90, 86. Who earned a greater total score? Which addition property can you use to find the answer?
Answer:
They had the same total score.
Explanation:
Given,
Francis’s scores on his math quizzes
86 + 84 + 90 = 260
Jillian’s scores on his math quizzes
84 + 90 + 86 = 260
Therefore they had the same total score.
Question 11.
Dean received the following amounts for mowing his neighbors’ lawns: $12.50, $16.75, $20.50, $33.25. Use mental math to find the total amount he earned.
Answer:
$84.
Explanation:
Given,
Amounts for mowing his neighbors’ lawns: $12.50, $16.75, $20.50, $33.25.
Round off the decimal to nearest tens.
$13, $17, $21, $33
$13 + $17 + $21 + $33 = $
Question 12.
Explain how you would find the sum of 4.2 and 2.14.
Answer:
To find the sum of two numbers with decimals we need to do align the decimal points.
4.2 + 2.14 = 6.34
Test Practice
Question 13.
Tammy made a bracelet using red, white, and blue string. The red string is 2.4 centimeters long, the white string is 2.1 centimeters long, and the blue string is 2.6 centimeters long. What is the total length of the three strings?
(A) 7.1 centimeters
(B) 6.1 centimeters
(C) 5.5 centimeters
(D) 4.27 centimeters
Answer:
7.1 cm
Explanation:
Given,
No of red strings is 2.4 centimeters long
The white string is 2.1 centimeters long
the blue string is 2.6 centimeters long
2.4 + 2.1 + 2.6 = 7.1 cm