Practice Mass Measurement in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

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Quick Recap

Mass measurement determines how much matter an object contains, using standard units such as grams and kilograms.

Mass tells you how heavy something feels — a paperclip is about 1 gram, a textbook is about 1 kilogram.

Showing a random 20 of 50 problems.

Example 1

medium
A bag of apples is 2.5 kg. After removing one 150 g apple, what is the new mass in g?

Example 2

easy
Convert 6200 g to kilograms.

Example 3

hard
A metal cube is 5 cm on a side and has density 7 g/cm3. What is its mass in kg?

Example 4

medium
A balance scale has 750 g on one side. You add 250 g and a mystery object to balance 2 kg on the other side. What is the object's mass?

Example 5

easy
1 mg is ___ of a gram.

Example 6

easy
Which unit best measures the mass of a paperclip?

Example 7

medium
A solution is made of 200 g of sugar dissolved in 800 g of water. What fraction of the solution's mass is sugar?

Example 8

hard
A boat carries 1.5 tonnes of cargo. If each crate is 75 kg, how many crates does the boat carry?

Example 9

medium
How many milligrams are in 2.5 grams?

Example 10

hard
Two materials are combined: 200 cm3 of A (density 3 g/cm3) and 100 cm3 of B (density 5 g/cm3). What is the total mass in kg?

Example 11

medium
A baker uses 1.8 kg of flour daily. How many g per week (7 days)?

Example 12

medium
A box of 12 cans has total mass 4.2 kg. What is the mass of one can in g?

Example 13

medium
A balance has 1.5 kg on one side. To balance, you add 300 g and need more on that side. How much more to reach balance?

Example 14

medium
A truck can carry 2 tonnes. How many 50 kg sacks can it carry?

Example 15

hard
A solid has volume 0.5 L and density 1.2 g/mL. What is its mass in kg?

Example 16

easy
True or false: a 1 kg bag of feathers weighs the same as 1 kg of rocks.

Example 17

easy
Which unit best measures the mass of a person?

Example 18

medium
If 1 lb ≈454 g, find the mass in g of 3 lb.

Example 19

easy
Which is heavier: 800 g or 1 kg?

Example 20

challenge
Two metals: 100 cm³ of one at 2.7 g/cm³ and 50 cm³ of another at 8 g/cm³ are combined. Find the total mass in kg.
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