Measuring Mass: Grams and Kilograms
Choosing units, comparing masses, and solving simple mass problems
Measuring Mass: Grams and Kilograms
Choosing units, comparing masses, and solving simple mass problems
Math - Grade 2-3
- 1
Circle the better unit to measure the mass of a pencil: grams or kilograms. Explain your choice.
Small, light objects are usually measured in grams.
Grams are the better unit because a pencil is light. - 2
Circle the better unit to measure the mass of a full backpack: grams or kilograms. Explain your choice.
Kilograms are the better unit because a full backpack is heavy. - 3
A bag of apples has a mass of 3 kilograms. A bag of oranges has a mass of 2 kilograms. Which bag has the greater mass?
Compare the numbers because both masses use kilograms.
The bag of apples has the greater mass because 3 kilograms is more than 2 kilograms. - 4
A marker has a mass of 12 grams. An eraser has a mass of 25 grams. How much greater is the mass of the eraser than the marker?
The eraser has 13 grams more mass than the marker because 25 - 12 = 13. - 5
One kilogram is equal to 1,000 grams. How many grams are in 2 kilograms?
Each kilogram is 1,000 grams.
There are 2,000 grams in 2 kilograms because 1,000 + 1,000 = 2,000. - 6
Look at a balance scale. The left side has a toy car labeled 80 g. The right side has a toy train labeled 120 g. Which object has the greater mass?
The toy train has the greater mass because 120 grams is more than 80 grams. - 7
Write g or kg to complete the sentence: A watermelon has a mass of about 4 ____.
Think about whether a watermelon is light or heavy.
A watermelon has a mass of about 4 kg because it is a heavy object. - 8
Write g or kg to complete the sentence: A paper clip has a mass of about 1 ____.
A paper clip has a mass of about 1 g because it is very light. - 9
Mia has two boxes. Box A has a mass of 5 kilograms. Box B has a mass of 7 kilograms. What is the total mass of the two boxes?
Add the two masses together.
The total mass is 12 kilograms because 5 + 7 = 12. - 10
A bag of rice has a mass of 10 kilograms. Ben uses 4 kilograms. How much rice is left?
There are 6 kilograms of rice left because 10 - 4 = 6. - 11
Three objects have these masses: a book is 600 g, a lunchbox is 900 g, and a hat is 100 g. Put the objects in order from lightest to heaviest.
Compare the numbers from smallest to largest.
The order from lightest to heaviest is hat, book, lunchbox because 100 g is less than 600 g and 600 g is less than 900 g. - 12
A dog has a mass of 18 kilograms. A cat has a mass of 5 kilograms. How much more mass does the dog have than the cat?
The dog has 13 kilograms more mass than the cat because 18 - 5 = 13. - 13
A digital scale shows 250 g for a bag of grapes. Another bag of grapes has a mass of 300 g. Which bag is heavier?
The bigger number of grams means the greater mass.
The 300 g bag is heavier because 300 grams is more than 250 grams. - 14
Fill in the blank: 1 kilogram = ____ grams.
A kilogram is a larger unit made of 1,000 grams.
1 kilogram equals 1,000 grams. - 15
A recipe needs 500 grams of flour and 200 grams of sugar. What is the total mass of the flour and sugar?
The total mass is 700 grams because 500 + 200 = 700.