Decimal and Fraction Adding and Subtracting

Adding Decimals

100

0.5 + 0.3

0.8

200

1.2 + 0.8

2.0 or 2

300

2.75 + 3.4

6.5 or 6.50

400

4.67 + 5.33

10.0 or 10

500

6.89 + 7.11

14 or 14.0 or 14.00

Subtracting Decimals

100

1.0 - 0.4

0.6

200

2.5 - 1.2

1.3

300

3.75 - 2.5

1.25

400

5.5 - 3.1

2.4

500

8.9 - 4.7

4.2

Adding Fractions

100

1/4 + 1/4

1/2 or 2/4

200

1/3 + 1/6

1/2 or 3/6

300

2/5 + 1/5

3/5

400

3/8 + 1/4

5/8

500

5/12 + 1/4

8/12 or 2/3

Subtracting Fractions

100

1/2 - 1/4

1/4

200

3/4 - 1/4

1/2 or 2/4

300

2/3 - 1/6

3/6 or 1/2

400

5/6 - 1/3

3/6 or 1/2

500

7/8 - 5/12

11/24

Mixed Operations

100

1.5 + 1/2

2.0 or 2

200

3/4 + 0.25

1.0 or 1

300

2/5 + 0.3

0.7 or 7/10

400

5/4 - 0.5

3/4 or 0.75

500

7/8 + 0.125

1.0 or 1