2.1: Topic A- Addition

Topic A: Addition

Addition puts amounts together. The answer of addition is called the sum or the total.

The plus sign + means to add.

says “three plus two equals five” or “three and two is five”.

The sum is 5.

You can count on your fingers to get the answers to addition questions but counting takes too long.

Addition facts are a tool that you use to do adding questions.

Exercise 1

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 9. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 

Answers to Exercise 1

1. 6
2. 4
3. 3
4. 7
5. 4
6. 5
7. 7
8. 6
9. 2
10. 9
11. 8
12. 3
13. 8
14. 7
15. 5
16. 9

Exercise 2

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 9. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 

Answers to Exercise 2

1. 9
2. 9
3. 8
4. 6
5. 0
6. 5
7. 8
8. 9
9. 6
10. 2
11. 7
12. 2
13. 9
14. 1
15. 8
16. 6

Exercise 3

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 9. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 

Answers to Exercise 3

1. 9
2. 9
3. 5
4. 9
5. 4
6. 7
7. 6
8. 7
9. 4
10. 9
11. 5
12. 5

Exercise 4

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 12. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 

Answers to Exercise 4

1. 11
2. 10
3. 8
4. 12
5. 7
6. 8
7. 10
8. 12
9. 12
10. 9
11. 9
12. 10
13. 9
14. 8
15. 12
16. 11

Exercise 5

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 12. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 

Answers to Exercise 5

1. 11
2. 10
3. 11
4. 7
5. 11
6. 11
7. 9
8. 10
9. 10
10. 12
11. 12
12. 8
13. 9
14. 3
15. 9
16. 9

Exercise 6

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 12. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 

Answers to Exercise 6

1. 12
2. 8
3. 10
4. 7
5. 11
6. 10
7. 10
8. 12
9. 11
10. 7
11. 12
12. 11

Need more practice?

Practice your addition facts using a set of dice.

Roll the dice and add the amounts on the dice.

Exercise 7

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 20. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 

Answers to Exercise 7

1. 13
2. 14
3. 13
4. 12
5. 16
6. 19
7. 15
8. 10
9. 15
10. 17
11. 10
12. 16
13. 11
14. 8
15. 9
16. 9

Exercise 8

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 20. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 

Answers to Exercise 8

1. 11
2. 14
3. 18
4. 15
5. 10
6. 11
7. 11
8. 13
9. 7
10. 12
11. 17
12. 10

Exercise 9

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 20. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 

Answers to Exercise 9

1. 13
2. 9
3. 10
4. 9
5. 16
6. 13
7. 15
8. 12
9. 10
10. 12
11. 10
12. 15
13. 10
14. 13
15. 16
16. 12

Exercise 10

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 20. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 

Answers to Exercise 10

1. 17
2. 14
3. 16
4. 11
5. 10
6. 13
7. 11
8. 11
9. 11
10. 15
11. 14
12. 14

Exercise 11

Check out your addition facts by doing this exercise as quickly as possible without counting on your fingers. The highest total or sum (what the numbers add up to) for these number facts is 20. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 

Answers to Exercise 11

1. 9
2. 8
3. 8
4. 10
5. 9
6. 15
7. 4
8. 2
9. 13
10. 11
11. 5
12. 16

Need some extra practice?

Find a partner and play the following card game. You will use a regular deck of cards

• Take out the jacks, queens and kings.
• Shuffle the cards and deal them out.
• Do not look at your cards. Leave them in a pile in from of you.
• Each player flips over a card.
• Take turns adding the numbers on the cards.
• If the person whose turn it is gets the right answer that person gets to keep the cards.
• If the person whose turn it is gets the wrong answer the other player gets the cards.
• The person who collects all the cards is the winner.
• You could also set a time limit and the person with the most cards when time is up is the winner.

Exercise 12

Here are some extra questions if you need more practice. The highest total or sum (what the numbers add up to) for these number facts is 20. Check your work using the answer key at the end of the exercise. Then, make a list of any addition facts you do not know, or which are slow, practice them.

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 

Answers to Exercise 12

1. 13
2. 11
3. 6
4. 15
5. 3
6. 10
7. 13
8. 7
9. 13
10. 3
11. 16
12. 9
13. 8
14. 8
15. 10
16. 9

Adding Across

So far you have only been adding numbers when they are up and down or vertical.

Example:

\[\begin{align} 4 \\ +5 \\ \hline 9 \end{align}\]

Another way to add numbers is across or horizontally.

4 + 5 = 9

In math, sometimes you will need to work from left to right.

Exercise 13

Practice adding across or horizontally. The highest total or sum (what the numbers add up to) for these number facts is 20. Check your work using the answer key at the end of the exercise.

1. 10 + 0 =
2. 2 + 2 =
3. 5 + 3 =
4. 1 + 1 =
5. 8 + 4 =
6. 7 + 1 =
7. 0 + 4 =
8. 6 + 3 =
9. 3 + 2 =
10. 1 + 10 =
11. 9 + 3 =
12. 4 + 9 =
13. 3 + 7 =
14. 4 + 8 =

Answers to Exercise 13

1. 10
2. 4
3. 8
4. 2
5. 12
6. 8
7. 4
8. 9
9. 5
10. 11
11. 12
12. 13
13. 10
14. 12

Exercise 14

Practice adding across or horizontally. The highest total or sum (what the numbers add up to) for these number facts is 20. Check your work using the answer key at the end of the exercise.

1. 9 + 6 =
2. 8 + 9 =
3. 9 + 9 =
4. 2 + 3 =
5. 7 + 3 =
6. 10 + 8 =
7. 9 + 7 =
8. 8 + 8 =
9. 8 + 10 =
10. 3 + 9 =
11. 9 + 2 =
12. 4 + 4 =

Answers to Exercise 14

1. 15
2. 17
3. 18
4. 5
5. 10
6. 18
7. 16
8. 16
9. 18
10. 12
11. 11
12. 8

Word Problems

Learning addition facts is very important. Once you know them all, you can use them to solve word problems.

Word such as:

• more than
• plus
• added to
• sum
• total
• have altogether
• in all

tell you to add the numbers together.

Look for these words when reading word problems and underline them before trying to solve a problem. Circle the information that is given.

Example:

Before lunch Jane read 2 pages. After lunch she read 9 pages. How many pages did she read in all?

Before lunch Jane read 2 pages. After lunch she read 9 pages. How many pages did she read in all?

• You have circled 2 pages and 9 pages. This is the information you will use to find the answer.
• You have underlined “in all”. These words tell you to add.

\[\begin{align} 2\text{ pages}\\+9\text{ pages}\\ \hline 11\text{ pages} \end{align}\]

Jane read 11 pages in all.

Exercise 15

Solve each of the following word problems. Be sure to underline the words that tell you to add. Circle the information that is given. Have your instructor check your underlining and circling.

1. Sven bought 7 cans of juice on Monday. He bought 9 cans of juice on Wednesday. How many cans of juice did he buy altogether?
2. During the hockey game, Ewan took 8 shots from the blue line and 4 shots from in front of the net. How many shots did he take in all?
3. Marlene noticed that there were 4 people in her math class. The next day 6 more people were in her math class. What is the total number of people in Marlene’s math class?
4. The Blue Jays played two baseball games in a row. They got 10 runs in the first game and 7 runs in the second game. How many runs did they score altogether?
5. Jaswinder had 9 apples in her grocery cart. She added 5 more different apples. How many apples did she have in total?

Answers to Exercise 15

1. 16 cans
2. 12 shots
3. 10 people
4. 17 runs
5. 14 apples

Topic A Self-Test

Mark /22 Aim 19/22

1. Find the sums. Be sure to check your answers. (12 marks)
   1. 
   2. 
   3. 
   4. 
   5. 
   6. 
   7. 
   8. 
   9. 
   10. 
   11. 
   12. 
2. Find the sums. Be sure to check your answers. (4 marks)
   1. 6 + 7 =
   2. 3 + 8 =
   3. 4 + 6 =
   4. 8 + 5 =
3. Solve each of the following word problems. Be sure to include the unit of measure in your answer. Be sure to circle the information and underline what’s being asked.(6 marks, 2 marks each)
   1. Paco worked 5 hours on Monday and 9 hours on Tuesday. How many hours did Paco work in total?
   2. In the park, Ming-Mai counted 6 robins in the morning. In the afternoon, she counted 8 more robins. How many robins in all did Ming-Mai count?
   3. Omari bought 3 bananas on Monday. He bought 5 bananas on Tuesday. How many bananas did he buy altogether?

Answers to Topic A Self Test

1. 1. 15
   2. 13
   3. 6
   4. 13
   5. 8
   6. 10
   7. 5
   8. 10
   9. 9
   10. 17
   11. 11
   12. 11
   1. 13
   2. 11
   3. 10
   4. 13
   1. 14 hours
   2. 14 robins
   3. 8 bananas