Decimal Addition Word Problems

Jerry's parents own 8.7 acres of land. The two tallest trees on their land are 18.7 feet and 21.75 feet tall. What is the combined height of the two tallest trees?

Answer explanation

The word combined tells you to add. You only have to add the values for the heights of the trees. The number of acres of land that they own is not added.

Randall bought a pair of sandals for $12.75, a pair of sunglasses for $7.95, and a pair of sneakers for $75.99. How much did he spend altogether on shoes?

Answer explanation

The word altogether tells you to add. You only add the prices of the sandals and the sneakers. The price of the sunglasses is not added because sunglasses are not shoes.

Cam had $15.36 in his piggy bank, and his sister gave him $4.25. How much money does he have now?

Answer explanation

You know to add because Cam was given something, as opposed to giving something away.

Tammy spent 45.4 minutes playing soccer, 36.8 minutes playing lacrosse, and 19.5 minutes reading this week. How much time did she spend playing sports?

Answer explanation

Soccer and lacrosse are both sports, so you have to add those times together. Reading is not a sport, so you do not add in that time.

Nancy was buying food for her birthday party. She bought a 52.93 oz bag of barbeque chips and a 79.6 oz bag of regular chips. How many ounces did she buy all together?

• 132.53 ounces

• 33.33 ounces

• 26.77 bags

• 60.89 ounces

How much did her fruit weigh altogether?

• 0.25 pounds

• 2.05 pounds

• 2.5 pounds

• 25.0 pounds

Paige was measuring how much taller she got over two years. In the first year she grew 4.62 cm. In the second year she grew 7.7 cm. How much taller did she grow over the two years?

• 12.3 cm

• 3.8 years

• 12.32 cm

• 12.32 years

Emily bought the following amounts of fruit at a fruit stand:
0.75 pounds of grapes
0.5 pounds of bananas
1.25 pounds of apples

How much did her fruit weigh altogether?

• 0.25 pounds

• 2.05 pounds

• 2.50 pounds

• 25.0 pounds

Johnny has 2.6 pounds of bananas,  3.1 pounds of grapes, and 6.3 pounds of apples.  How many pounds does Johnny have altogether?

• 12.9

• 12.0

The trail is divided into three sections. The first section is 7.2 miles, the second section is 4.28 miles, and the third section is 2.03 miles. How long is the trail?

• 7.03

• 11.48

• 13.51

• 9.45