Math Grade 2-3

Measuring Mass: Grams and Kilograms

Choosing units, comparing masses, and solving simple mass problems

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Choosing units, comparing masses, and solving simple mass problems

Math - Grade 2-3

Instructions: Read each problem carefully. Choose the best unit when needed and show your work in the space provided.
  1. 1
    A pencil with a small balance scale nearby.

    Circle the better unit to measure the mass of a pencil: grams or kilograms. Explain your choice.

  2. 2
    A full school backpack with books inside.

    Circle the better unit to measure the mass of a full backpack: grams or kilograms. Explain your choice.

  3. 3
    Two grocery bags, one with apples and one with oranges.

    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?

  4. 4
    A marker and an eraser shown near a balance scale.

    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?

  5. 5

    One kilogram is equal to 1,000 grams. How many grams are in 2 kilograms?

  6. 6
    A balance scale with a toy car and a heavier toy train.

    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?

  7. 7
    A large watermelon shown as a heavy object.

    Write g or kg to complete the sentence: A watermelon has a mass of about 4 ____.

  8. 8
    A small paper clip shown as a very light object.

    Write g or kg to complete the sentence: A paper clip has a mass of about 1 ____.

  9. 9
    Two cardboard boxes near a scale.

    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?

  10. 10
    A bag of rice with some rice being scooped out.

    A bag of rice has a mass of 10 kilograms. Ben uses 4 kilograms. How much rice is left?

  11. 11
    A hat, a book, and a lunchbox shown for comparing mass.

    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.

  12. 12
    A larger dog sitting beside a smaller cat.

    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?

  13. 13
    Two bags of grapes, one on a digital scale.

    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?

  14. 14

    Fill in the blank: 1 kilogram = ____ grams.

  15. 15
    Flour and sugar with measuring tools on a counter.

    A recipe needs 500 grams of flour and 200 grams of sugar. What is the total mass of the flour and sugar?

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