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3rd grade · Math · Unit 6 of 12

Measuring

Length, mass and capacity

What your child practices

Measuring with centimeters and meters, grams and kilograms, milliliters and liters: choosing sensible units, estimating, comparing and solving measurement problems.

Minnesota K-12 Academic Standards benchmark: 3.2.3.2 · comparing the sizes of units in one system, such as grams and kilograms

How we explain it

Children can open this short lesson before they practice.

  1. Length: millimeters, centimeters, meters and kilometers.
  2. Mass: grams (g) and kilograms (kg).
  3. Capacity: milliliters (mL) and liters (L). Pick a unit that fits.

Example: Which unit fits the mass of an apple? An apple is light. Light things are measured in grams. Answer: Grams (g)

Measuring in Minnesota

In the Minnesota K-12 Academic Standards, this is unit 6 of 12 in 3rd grade Math, after Patterns & Equations and before Numbers to 10,000.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Minnesota Department of Education (MDE)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Which unit would you use to measure the mass of a coin?

    🪙
    • kilograms
    • grams
    • milliliters

  2. Question 2

    Which unit would you use to measure the length of a book?

    📕
    • liters
    • centimeters
    • meters

  3. Question 3

    About how heavy is a watermelon?

    🍉
    • 40 kg
    • 4 g
    • 4 kg

  4. Question 4

    A puppy has a mass of 40 kg. A kitten has a mass of 7 kg. How much more mass does the puppy have?

    🐶

    answer boxkg

  5. Question 5

    Which holds more: 1 L or 750 mL?

    • They are the same
    • 1 L
    • 750 mL

  6. Question 6

    How long is the pencil?

    answer boxcm

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