Add positive and negative fractions and decimals.

Estimate the value of each expression.

1. –6.2 + 9.9

2.

3. 18.31 – 22.9

4.

5. –0.529 + (–0.44)

203

103 137

15

14

7

2

1. Write all mixed numbers as improper fractions.

2. Make the bottoms the same. 1. put the negative on the top number.

3. Use integer rules to add the numerators … the bottom stays the same.

4. Simplify

5

43

5

19

)4

3(

3

2

12

1

12

1

12

9

12

8

Find the sum of .

Write fractions with a common denominator.

Rewrite the problem with the negative in the numerator.

Add the numerators.

Simplify. Move the negative in front of the fraction.

3

1

6

5

6

2

6

5

6

3

6

25

2

1

6

3

1. Determine the sign of the answer.

2. Do you add or subtract?

3. Line up the decimal points & add or subtract.

The change in the value of Digimaxx stock last week was points. This week the change in the stock’s value was points. Find the total change in value of Digimaxx stock over the last two weeks.

Write the problem.

Write as improper fractions.

Write with common denominators.

Put the negatives in the numerators. Add and simplify.

413

321

32

41 13

3

51 and

4

133 3

241

12

20

3

5 and

12

39

4

13

12114

12

59

12

2039

12

20

12

39

Find the value of −3.52 + 14.7.

Only one decimal is negative. The answer will have the sign of the number with the larger absolute value.

Line up the decimal points and subtract.

− 3.52 + 14.7 = 11.1818.11

52.3

70.14

Find each sum.

1. −8.2 + (−2.3)

2.

3. 0.49 + (−0.6)

4.

3

2

9

2

41

21 21

What are the steps you would go through to find the

value of ? 4

1

3

2