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3rd grade · Math · Unit 6 of 14

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.

Arizona Academic Standards learning standard: 3.MD.A.2 · estimating and measuring liquid volumes and masses

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 Arizona

In the Arizona Academic Standards, this is unit 6 of 14 in 3rd grade Math, after Patterns & Equations and before Time.

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: Arizona Department of Education

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

    A puppy has a mass of 29 kg. A kitten has a mass of 2 kg. How much more mass does the puppy have?

    🐶

    answer boxkg

  2. Question 2

    Which unit would you use to measure how much a spoon holds?

    🥄
    • centimeters
    • milliliters
    • liters

  3. Question 3

    About how tall is a Grade 3 student?

    🧒
    • 130 cm
    • 13 cm
    • 130 m

  4. Question 4

    About how much does a juice box hold?

    🧃
    • 200 mL
    • 200 L
    • 20 L

  5. Question 5

    How long is the spoon?

    answer boxcm

  6. Question 6

    How many centimeters are in 2 meters?

    answer box

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