All the solutions provided in **McGraw Hill Math Grade 5 Answer Key PDF Chapter 9 Lesson 2 Metric Units of Mass **are as per the latest syllabus guidelines.

## McGraw-Hill Math Grade 5 Answer Key Chapter 9 Lesson 2 Metric Units of Mass

**Solve.
**Question 1.

Mr. Wayne bought a watermelon with a mass of 1.89 kilograms. What is the mass of the watermelon in grams?

Answer:

1890 g is the mass of the watermelon in grams.

Explanation:

Number of kilograms is the watermelon Mr. Wayne bought = 1.89.

Conversion:

1 kg = 1000 g.

Number of grams is the watermelon Mr. Wayne bought = 1.89 Ã— 1000

= 1890.

Question 2.

Kenâ€™s dog is 4,200 grams. Sharonâ€™s dog is 7,600 grams. What is the sum of the mass of both dogs in kilograms?

Answer:

11.8 kg is the sum of the mass of both dogs in kilograms.

Explanation:

Number of grams Kenâ€™s dog = 4200.

Number of grams Sharonâ€™s dog = 7600.

Total number of grams of both dogs = Number of grams Kenâ€™s dog + Number of grams Sharonâ€™s dog

= 4200 + 7600

= 11800.

Conversion:

1 kg = 1000 g.

=> 11800 g = 11800 Ã· 1000

=> 11.8 kg.

Question 3.

A company has a pile of steel pipes with a total mass of 19,450 kg. The pipes need to be shipped by truck, but the companyâ€™s truck can safely hold only 10 metric tons. How many trips will it take to ship all of the steel pipes? How do you know?

Answer:

Number of trips will it take to ship all of the steel pipes = 1.945.

Explanation:

Total number of kilograms a company has a pile of steel pipes = 19,450.

Number of metric tons the companyâ€™s truck can safely hold = 10.

Conversion:

1 metric ton = 1000 kilograms.

=> Total number of kilograms a company has a pile of steel pipes = 19450 Ã· 1000

=> 19.45 metric tons.

Number of trips will it take to ship all of the steel pipes = 19.45 Ã· 10

= 1.945.

Question 4.

A serving of cottage cheese is considered to be 113 grams. What is the mass of a serving of cottage cheese in milligrams?

Answer:

113000 mg is the mass of a serving of cottage cheese in milligrams.

Explanation:

Number of grams of a serving of cottage cheese is considered to be = 113.

Conversion:

1 gramÂ = 1000 milligrams.

Number of milligrams of a serving of cottage cheese is considered to be = 113 Ã— 1000

= 113000.

Question 5.

A science experiment calls for 130 mg of cobalt chloride and 190 mg of water. What is the difference between these two amounts in grams?

Answer:

0.06 g is the difference between these two amounts in grams.

Explanation:

Number of milligrams a science experiment calls for of cobalt chloride = 130.

Number of milligrams a science experiment calls for of water = 190.

Difference:

Number of milligrams a science experiment calls for of water – Number of milligrams a science experiment calls for of cobalt chloride

= 190 – 130

= 60.

Conversion:

1 g = 1000 mg.

=> 60mg = 60 Ã· 1000 = 0.06 g.

Question 6.

An elephant at a zoo has a mass of 6.8 metric tons. A rhinoceros at the same zoo has a mass of 2.2 metric tons, and a hippopotamus has a mass of 2.9 metric tons. What is the sum of the mass of these three animals in kilograms?

Answer:

11900 kgs is the sum of the mass of these three animals in kilograms.

Explanation:

Number of metric tons an elephant at a zoo = 6.8.

Number of metric tons a rhinoceros at a zoo = 2.2.

Number of metric tons a hippopotamus at a zoo = 2.9.

Total number of metric tons of three animals = Number of metric tons an elephant at a zoo + Number of metric tons a rhinoceros at a zoo + Number of metric tons a hippopotamus at a zoo

= 6.8 + 2.2 + 2.9

= 9.0 + 2.9

= 11.9.

Conversion:

1 metric ton = 1000 kgs.

=> Total number of metric tons of three animals = 11.9 Ã— 1000

=> 11900.