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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.

Alabama Course of Study content standard: 4.21 · choosing units and knowing the relative sizes of metric units of length, 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 Alabama

In the Alabama Course of Study, 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: Alabama State Department of Education (ALSDE)

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

    8000 g = kg

    8000 g = kg

    answer box

  2. Question 2

    6 kg = g

    6 kg = g

    answer box

  3. Question 3

    Which tool would you use to measure capacity?

    • a measuring cup
    • a scale
    • a ruler

  4. Question 4

    What does the prefix “milli” mean?

    • 1000 times as much
    • one hundred times as much
    • one thousandth

  5. Question 5

    About how much does a juice box hold?

    • 250 L
    • 250 mL
    • 25 mL

  6. Question 6

    Which unit is best for the capacity of a spoon?

    • liters
    • milliliters
    • kilograms

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