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4th grade · Math · Unit 11 of 17

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.

New York State Learning Standards learning standard: NY-4.MD.1; NY-4.MD.2 · converting metric units of mass and liquid volume and using them in word problems

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 New York

In the New York State Learning Standards, this is unit 11 of 17 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: New York State Education Department (NYSED)

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

    6000 g = kg

    6000 g = kg

    answer box

  2. Question 2

    About how much does a juice box hold?

    • 25 mL
    • 250 L
    • 250 mL

  3. Question 3

    Which unit is best for the mass of an apple?

    • kilograms
    • grams
    • liters

  4. Question 4

    Which unit is best for the thickness of a coin?

    • meters
    • millimeters
    • kilometers

  5. Question 5

    3000 mL = L

    3000 mL = L

    answer box

  6. Question 6

    What does the prefix “centi” mean?

    • one thousandth
    • one hundredth
    • 1000 times as much

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