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4th grade · Math · Unit 11 of 15

Metric Measures

Grams, kilograms, liters and milliliters

What your child practices

Changing between grams and kilograms and between liters and milliliters, understanding kilo, centi and milli, and choosing a sensible unit and tool.

Arizona Academic Standards learning standard: 4.MD.A.1 · relative sizes of metric units of mass and capacity

How we explain it

Children can open this short lesson before they practice.

  1. 1 m = 100 cm. 1 L = 1000 mL. 1 kg = 1000 g.
  2. Going to a smaller unit: multiply.
  3. Going to a bigger unit: divide.

Example: 4 L = ☐ mL 1 L is 1000 mL. 4 × 1000 = 4000. Answer: 4000 mL

Metric Measures in Arizona

In the Arizona Academic Standards, this is unit 11 of 15 in 4th grade Math, after Angles & Area and before Prime & Composite.

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

    What does the prefix “centi” mean?

    • one thousandth
    • 1000 times as much
    • one hundredth

  2. Question 2

    6 kg = g

    6 kg = g

    answer box

  3. Question 3

    8000 mL = L

    8000 mL = L

    answer box

  4. Question 4

    8000 g = kg

    8000 g = kg

    answer box

  5. Question 5

    Which unit is best for the mass of an apple?

    • grams
    • kilograms
    • liters

  6. Question 6

    Which unit is best for the capacity of a bathtub?

    • milliliters
    • liters
    • grams

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