Download Review Addition and Subtraction Facts

NS 1.0
Students compute with very large and very small numbers,
positive integers, decimals, and fractions and understand the
relationship between decimals, fractions, and percents. They
understand the relative magnitudes of numbers.
UNDERLYING SKILLS AND CONCEPTS:
use mental math;
understand the meaning of addition
and subtraction
Review Addition and Subtraction Facts
!
Addition and subtraction
facts are related.
They are inverse
operations.
You can use the table to find
addition and subtraction facts.
E x am p l E
1
Addition is the inverse, or opposite,
of subtraction.
1
2
3
4
5
6
7
8
1 1
2
3
4
5
6
7
8
9 10 11
2 2
3
4
5
6
7
8
9 10 11 12
3 3
4
5
6
7
8
9 10 11 12 13
4 4
5
6
7
8
9 10 11 12 13 14
5 5
6
7
8
9 10 11 12 13 14 15
6 6
7
8
9 10 11 12 13 14 15 16
7 7
8
9 10 11 12 13 14 15 16 17
8 8
9 10 11 12 13 14 15 16 17 18
9 10
9 9 10 11 12 13 14 15 16 17 18 19
5 ! 7 " 12,
10 10 11 12 13 14 15 16 17 18 19 20
then you know that 12 # 7 " 5 and
12 # 5 " 7.
If you know that
0 0
8 ! 9 " 17,
then you know that 17 # 9 " 8 and
17 # 8 " 9.
E x am p l E
2
A family of facts is a related set of equations.
There are usually four equations, or facts, in the family.
Here is a family of facts for the numbers 6, 13, and 19.
13 ! 6 " 19
19 # 6 " 13
6, 13 and 19
make a
fact “family.”
6 ! 13 " 19 19 # 13 " 6
Notice that there are two addition facts and two subtraction facts.
Subtraction is the inverse, or opposite, of addition.
19 # 6 " 13
13 ! 6 " 19
6
page 14
19
19 # 13 " 6
13
6 ! 13 " 19
Chapter 2 – Lesson 1
E – © CSL Associates, Inc. All rights reserved.
If you know that
0 1 2 3 4 5 6 7 8 9 10
Name
P RAC T I C E
See how quickly you can write the answers to these basic facts.
1. 3 5 8
6. 16 7 9
11. 12 7 19
16. 13 6 7
2. 4 9 13
7. 15 9 6
12. 16 9 7
17. 17 9 8
3. 7 5 12
8. 12 8 20
13. 19 10 9
18. 12 8 4
4. 6 8 14
9. 13 8 5
14. 18 9 9
19. 19 9 10
5. 17 9 8
14
15. 12 7 5
20. 11 9 10. 9 5 2
Complete the fact. Then write three related facts.
21. 4 9 13
22. 15 7 8
23. 7 9 16
9 4 13
15 8 7
9 7 16
13 9 4
7 8 15
16 7 9
13 4 9
8 7 15
16 9 7
Answer Yes or No. Explain your decision.
24. If you know the amount of money you have and how much you and
Mary have together, can you find out how much money Mary has?
Yes.
E – © CSL Associates, Inc. All rights reserved.
You can subtract what you have from the total that you both have.
25. Is there a number 10 or less that you can add to another number
No.
also 10 or less to get a sum of 22?
The greatest sum would be 20.
Circle the correct choice.
26. If you are 5 feet tall and you sister is 3 feet shorter,
which operation would you use to find your sister’s height?
A
addition
Math
Reasoning
B
subtraction
C
multiplication
Inverse Operations
D
division
MR 2.3, 2.6
27. Addition and subtraction are inverse operations.
Explain what this means.
They are opposite from each other; addition undoes subtraction.
You can use subtraction to find missing addends.
Chapter 2 – Lesson 1
page 15
MCX94.HW.CL.G5.FM&Lesson.v211
8/2/04
18:02
Page 10
Name
…at home!
P RAC T I C E
See how quickly you can write the answers to these basic facts.
1. 4 5 9
6. 14 7 7
11. 10 7 17
16. 14 6 8
2. 5 9 14
7. 16 9 7
12. 14 9 5
17. 15 9 6
3. 6 5 11
8. 11 8 19
13. 18 10 8
18. 11 8 3
4. 7 8 15
9. 12 8 4
14. 12 9 3
19. 15 9 6
5. 18 9 9
13
15. 16 7 9
20. 9 9 0
10. 8 5 Complete the fact. Then write three related facts.
21. 5 7 12
22. 14 6 8
23. 8 9 17
7 5 12
14 8 6
9 8 17
12 7 5
8 6 14
17 9 8
12 5 7
6 8 14
17 8 9
Answer Yes or No. Explain your decision.
24. If you know the amount of money you have and how much you and
(Joan’s $ my $) my $ Joan’s $.
25. Is there a number 20 or less that you can add to another number
No.
also 20 or less to get a sum of 44?
20 20 40 which is less than 44. All the other numbers are less
Circle the correct choice.
than 20 and the sums will be less than 44.
26. If you are 5 feet tall and you brother is 2 feet shorter,
which operation would you use to find your brother’s height?
A
addition
Math
Reasoning
B
subtraction
C
multiplication
D
division
Inverse Operations
MR 2.3, 2.6
27. Circle the two equations that are inverse operations.
15 7 8
page 10
8 5 13
7 6 13
Home Resource and Homework
8 7 15
Chapter 2 Lesson 1
E – © CSL Associates, Inc. All rights reserved.
Yes.
Joan have together, can you find out how much money Joan has?
MCX94TEG5CH01_32.v7.4.2 2/24/01 19:42 Page 29
Name
P RAC T I C E
See how quickly you can write the answers to these basic facts.
1. 3 5 8
6. 16 7 9
11. 12 7 19
16. 13 6 7
2. 4 9 13
7. 15 9 6
12. 16 9 7
17. 17 9 8
3. 7 5 12
8. 12 8 20
13. 19 10 9
18. 12 8 4
4. 6 8 14
9. 13 8 5
14. 18 9 9
19. 19 9 10
5. 17 9 8
14
15. 12 7 5
20. 11 9 10. 9 5 2
Complete the fact. Then write three related facts.
21. 4 9 13
22. 15 7 8
23. 7 9 16
9 4 13
15 8 7
9 7 16
13 9 4
7 8 15
16 7 9
13 4 9
8 7 15
16 9 7
Answer Yes or No. Explain your decision.
24. If you know the amount of money you have and how much you and
Mary have together, can you find out how much money Mary has?
Yes.
E – © CSL Associates, Inc. All rights reserved.
You can subtract what you have from the total that you both have.
25. Is there a number 10 or less that you can add to another number
No.
also 10 or less to get a sum of 22?
The greatest sum would be 20.
Circle the correct choice.
26. If you are 5 feet tall and you sister is 3 feet shorter,
which operation would you use to find your sister’s height?
A
addition
Math
Reasoning
B
subtraction
C
multiplication
Inverse Operations
D
division
MR 2.3, 2.6
27. Addition and subtraction are inverse operations.
Explain what this means.
They are opposite from each other; addition undoes subtraction.
You can use subtraction to find missing addends.
Chapter 2 – Lesson 1
Student Book Page
page 15
Name
…at home!
P RAC T I C E
See how quickly you can write the answers to these basic facts.
1. 4 5 9
6. 14 7 7
11. 10 7 17
16. 14 6 8
2. 5 9 14
7. 16 9 7
12. 14 9 5
17. 15 9 6
3. 6 5 11
8. 11 8 19
13. 18 10 8
18. 11 8 3
4. 7 8 15
9. 12 8 4
14. 12 9 3
19. 15 9 6
5. 18 9 9
13
15. 16 7 9
20. 9 9 0
10. 8 5 Complete the fact. Then write three related facts.
21. 5 7 12
22. 14 6 8
23. 8 9 17
7 5 12
14 8 6
9 8 17
12 7 5
8 6 14
17 9 8
12 5 7
6 8 14
17 8 9
Answer Yes or No. Explain your decision.
24. If you know the amount of money you have and how much you and
(Joan’s $ my $) my $ Joan’s $.
25. Is there a number 20 or less that you can add to another number
No.
also 20 or less to get a sum of 44?
20 20 40 which is less than 44. All the other numbers are less
Circle the correct choice.
than 20 and the sums will be less than 44.
26. If you are 5 feet tall and you brother is 2 feet shorter,
which operation would you use to find your brother’s height?
A
addition
Math
Reasoning
B
subtraction
C
multiplication
D
division
Inverse Operations
MR 2.3, 2.6
27. Circle the two equations that are inverse operations.
15 7 8
page 10
8 5 13
7 6 13
Home Resource and Homework
8 7 15
Chapter 2 Lesson 1
E – © CSL Associates, Inc. All rights reserved.
Yes.
Joan have together, can you find out how much money Joan has?