Practice the questions of McGraw Hill Math Grade 8 Answer Key PDF Lesson 7.4 Comparing and Ordering Decimals to secure good marks & knowledge in the exams.
McGraw-Hill Math Grade 8 Answer Key Lesson 7.4 Comparing and Ordering Decimals
Exercises
COMPARE
Order from least to greatest.
Question 1.
1.3, 1.031, 1.322, 13.1, .1332, 1.5, 1.55, 1.505
Answer:
0.1332, 1.031, 1.3, 1.322, 1.5, 1.505,1.55, 13.1
Explanation:
First arrange the decimals one beneath the other in their original order,
1.3
1.031
1.322
13.1
0.1332
1.5
1.55
1.505
Next examine each decimal writing one or more zeros to the right of the last digit.
1.3000
1.0310
1.3220
13.100
0.1332
1.5000
1.5500
1.5050
So, that all decimals will have the same number of digits.
Then order the decimals from least to the greatest.
0.1332, 1.031, 1.3, 1.322, 1.5, 1.505,1.55, 13.1
Question 2.
.751, .75, 7.51, .705, .075, .34, 1.675, 1.68
Answer:
0.075, 0.34, 0.705, 0.75, 0.751, 1.675, 1.68, 7.51
Explanation:
First arrange the decimals one beneath the other in their original order,
0.751
0.75
7.51
0.705
0.075
0.34
1.675
1.68
Next examine each decimal writing one or more zeros to the right of the last digit.
0.751
0.750
7.510
0.705
0.075
0.340
1.675
1.680
So, that all decimals will have the same number of digits.
Then order the decimals from least to the greatest.
0.075, 0.34, 0.705, 0.75, 0.751, 1.675, 1.68, 7.51
Question 3.
.17, 1.7, .017, .00175, .01695, .107, 1.07
Answer:
0.00175, 0.01695, 0.017, 0.107, 0.17, 1.07, 1.7
Explanation:
First arrange the decimals one beneath the other in their original order,
0.17000
1.70000
0.01700
0.00175
0.01695
0.10700
1.07000
Next examine each decimal writing one or more zeros to the right of the last digit.
So, that all decimals will have the same number of digits.
Then order the decimals from least to the greatest.
0.00175, 0.01695, 0.017, 0.107, 0.17, 1.07, 1.7
Question 4.
.625, .405,-.420, .415, .451, 1.4
Answer:
0.405, 0.415, 0.420, 0.45, 0.451, 0.625, 1.4
Explanation:
First arrange the decimals one beneath the other in their original order,
0.625
0.405
-.420
0.415
0.451
1.4
Next examine each decimal writing one or more zeros to the right of the last digit.
0.625
0.405
-.420
0.415
0.451
1.400
So, that all decimals will have the same number of digits.
Then order the decimals from least to the greatest.
0.405, 0.415, 0.420, 0.45, 0.451, 0.625, 1.4
Order from greatest to least.
Question 5.
.25, .333, .15, .155, .125, .33
Answer:
0.333, 0.33, 0.25, 0.155, 0.15, 0.125
Explanation:
When comparing numbers with decimals, always look at the whole numbers first;
if two whole numbers are same, then compare the numbers to the right of the decimal point.
As with the whole numbers, each digit is one place value higher than the digit to its immediate right.
Then arrange the numbers from greatest to least.
0.333, 0.33, 0.25, 0.155, 0.15, 0.125
Question 6.
.332, .3334, .334, .3, .3033, .0335, 1.0001
Answer:
1.001, 0.334, 0.3334, 0.332, 0.3033, 0.3, 0.0335
Explanation:
When comparing numbers with decimals, always look at the whole numbers first;
if two whole numbers are same, then compare the numbers to the right of the decimal point.
As with the whole numbers, each digit is one place value higher than the digit to its immediate right.
Then arrange the numbers from greatest to least.
1.001, 0.334, 0.3334, 0.332, 0.3033, 0.3, 0.0335
Question 7.
.6667, .7501, .6, .75, .751, .707, .667
Answer:
0.751, 0.7501, 0.75, 0.707, 0.667, 0.6667, 0.6
Explanation:
When comparing numbers with decimals, always look at the whole numbers first;
if two whole numbers are same, then compare the numbers to the right of the decimal point.
As with the whole numbers, each digit is one place value higher than the digit to its immediate right.
Then arrange the numbers from greatest to least.
0.751, 0.7501, 0.75, 0.707, 0.667, 0.6667, 0.6
Question 8.
.68, .55, .6, .63, .6665, .06665, .59996
Answer:
0.68, 0.6665, 0.63, 0.6, 0.59996, 0.55, 0.6665
Explanation:
When comparing numbers with decimals, always look at the whole numbers first;
if two whole numbers are same, then compare the numbers to the right of the decimal point.
As with the whole numbers, each digit is one place value higher than the digit to its immediate right.
Then arrange the numbers from greatest to least.
0.68, 0.6665, 0.63, 0.6, 0.59996, 0.55, 0.6665