Operations on Decimals Exercises – Set 1

This is our first set of exercises on operations on decimals.

Perform the indicated operation.

1. 2.3 + 4.7 + 0.5
2. 5.3 + 6.07 + 8
3. 2.08 + 6.004 + 3.5
4. 4.6 – 1.3
5. 12.8 – 4.9
6. 7.2 – 3.019
7. 5 – 4.129
8.0.7 – 0.146
9. 5.482 – 3
10.4.8 x 3.2
11.8 x 9.63
12.100 x 2.654
13. 6.7 x 3.25
14. 2.8 / 0.14
15. 7 / 0.035
16. 1.5 / 3

Answer:
1. 7.5
2. 19.37
3. 11.584
4. 3.3
5. 7.9
6. 4.181
7. 0.871
8. 0.554
9. 2.482
10. 15.36
11. 77.04
12. 265.4
13. 21.775
14. 20
15. 200
16. 0.5

Enjoy!

You might also like: Operations on Decimals Exercises – Set 2

PCSR Civil Service Exam Review Guide 5

After learning the operations on fractions in Review Guide 3 and Review Guide 4, let us turn our attentionto operations on decimals this week. In this tutorial, we are going to learn addition, subtraction, multiplication, and division. Here is your review guide from the week.

PART I: MATHEMATICS

A. Operations on Decimals

A.1 Videos

Lesson 1: How to Add Numbers with Decimals Part 1
Lesson 2: How to Add Numbers with Decimals Part 2
Lesson 3: How to Subtract Numbers with Decimals Part 1
Lesson 4: How to Subtract Numbers with Decimals Part 2
Lesson 5: How to Multiply Numbers with Decimals Part 1
Lesson 6: How to Multiply Numbers with Decimals Part 2
Lesson 7: How to Divide Numbers with Decimals Part 1
Lesson 8: How to Divide Numbers with Decimals Part 2
Lesson 9: How to Divide Numbers with Decimals Part 3
Lesson 10: How to Divide Numbers with Decimals Part 4
Lesson 11: How to Divide Numbers with Decimals Part 5

A.2 More videos

Lesson 1: How to Add Numbers with Decimals
Lesson 2: How to Subtract Numbers with Decimals
Lesson 3: How to Multiply Numbers with Decimals
Lesson 4: How to Divide Numbers with Decimals

A.3 Articles

Lesson 1: How to Add Numbers with Decimals
Lesson 2: How to Subtract Numbers with Decimals
Lesson 3: How to Multiply Numbers with Decimals
Lesson 4: How to Divide Numbers with Decimals

PART II: ENGLISH

A. Vocabulary

Civil Service Exam Vocabulary Review Part 5
Tip: Try to memorize the words and use it in your own words.

B. Grammar – The Perfect Progressive Tenses

Lesson 1: Present Perfect Progressive Tense
Lesson 2: Past Perfect Progressive
Lesson 3: Future Perfect Progressive

Enjoy!

Week 7 Review: Answers and Solutions

Below are the answers to the Week 7 Review Exercises and Problems. Since I cannot align the decimals using this platfrom, I just wrote the answers. You can check your answer using a calculator.

Exercise 1
a.) 1.2 + 3.02 + 4.003 (Answer: 8.223)
b.) 1.05 + 0.006 + 4.501 (Answer: 5.55)
c.) 12.1 – 4.25 (Answer: 7.85)
d.) 11.8 – 2.005 (Answer: 9.795)
e.) 12.1 – 21.53 + 2.563 (Answer: -6.867)

Exercise 2
a.) 3 × 0.41 (Answer: 1.23)
b.) 0.02 × 0.56 (Answer: 0.0112)
c.) 5.1 × 0.45 (Answer: 2.295)
d.) 5.8 × 4.25 (Answer: 24.65)
e.) 2.8 × 3.2 × 0.6 (Answer: 5.376)

Exercise 3
a.) 3 ÷ 0.2 (Answer: 15)
b.) 5.1 ÷ 0.3 (Answer: 17)
c.) 6.4 ÷ 4 (Answer: 1.6)
d.) 8.1 ÷ 0.009 (Answer: 900)
e.) 0.125 ÷ 0.25 (Answer: 0.5)

Problems

1.) Convert 0.25 to fraction. (Answer: 1/4)

2.) Convert 1/8 to decimal. (Answer: 0.125)

3.) Convert 3/4 to percent. (Answer: 75%)

4.) Convert 35% to fraction. (Answer: 7/20)

5.) Convert 20% to decimal. (Answer: 0.2)

Enjoy your review!

Week 7 Review: Practice Exercises and Problems

Now that we have learned how to operate with decimals and percents and how to convert from one representation to another, let’s have some exercises.

Exercise 1
a.) 1.2 + 3.02 + 4.003
b.) 1.05 + 0.006 + 4.501
c.) 12.1 – 4.25
d.) 11.8 – 2.005
e.) 12.1 – 21.53 + 2.563

Exercise 2
a.) 3 × 0.41
b.) 0.02 × 0.56
c.) 5.1 × 0.45
d.) 5.8 × 4.25
e.) 2.8 × 3.2 × 0.6

Exercise 3
a.) 3 ÷ 0.2
b.) 5.1 ÷ 0.3
c.) 6.4 ÷ 4
d.) 8.1 ÷ 0.009
e.) 0.125 ÷ 0.25

Problems

1.) Convert 0.25 to fraction.

2.) Convert 1/8 to decimal.

3.) Convert 3/4 to percent.

4.) Convert 35% to fraction.

5.) Convert 20% to decimal.

Enjoy your review!

Practice Exercises on Subtracting Decimals

We have already learned how to add and subtract numbers with decimals. In this post, we practice subtracting decimals. Recall that in subtracting decimals, the decimal points should be aligned.

Practice Exercises

1.) 2.32 – 1.82
2.) 6.71 – 3.9
3.) 6 – 0.52
4.) 5.03 – 4.25
5.) 0.53 – 0.33
6.) 4 – 1.26
7.) 7.28 – 2.4
8.) 7.08 – 0.29
9.) 3 – 0.305
10.) 40 – 12.5

Answers

1.) 0.5
2.) 2.81
3.) 5.48
4.) 0.78
5.) 0.2
6.) 2.74
7.) 4.88
8.) 6.79
9.) 2.695
10.) 27.5

Enjoy learning!

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