Deck 11: Addition of Decimal Fractions

Question 1

A technician orders several items to fix a hot water heating system as follows: acid core solder at $2.62; solder paste at $0.67; a stop valve at $3.15; a 90° elbow at $0.45; and 1/2-inch copper tubing at $6.25. What is the total cost of the items ordered?

Answer 1

$13.14

Question 2

Add the following decimal fractions: 0.125 + 0.25 + 1.125 =

Answer 2

1.5

Question 3

A partially filled cylinder of refrigerant R-124 weighs 47.8 pounds. Another 15.9 pounds of R-124 are put into the cylinder. How much does the cylinder now weigh?

Answer 3

63.7

Question 4

To add decimal fractions, place the fractions in columns, aligning the decimal points.

Question 5

Add the following decimal fractions: $1,427.66 + $532.54 + $3.29 =

Question 6

Add the following decimal fractions: 19.399 + 51.645 + 6.52 + 5.56 =

Question 7

Upon being started, a motor draws additional current until the motor is running. A large fan motor draws 3.39 amperes of current when running. When starting, the fan motor draws an additional 9.25 amperes of starting current. What is the total current in amperes drawn by the fan motor while starting?

Question 8

An technician works on 4 different jobs. The first takes 7.25 hours, the second takes 12.25 hours, the third takes 13.50 hours, and the fourth job takes 6.25 hours. How many total hours did the tecnhician work?

Question 9

The second place to the right of the decimal point in a decimal fraction is called the tenths place.

Question 10

Add the following decimal fractions: 1.577 meters + 6.5329 meters + 10.7721 meters + 0.3776 meters =