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2nd grade · Math · Unit 4 of 16

Measuring

Centimeters and meters

What your child practices

Measuring with a ruler from zero and choosing between centimeters and meters.

Arizona Academic Standards learning standard: 2.MD.A.1; 2.MD.A.3 · measuring and estimating lengths in centimeters and meters

How we explain it

Children can open this short lesson before they practice.

  1. Centimeters (cm) measure short lengths.
  2. Meters (m) measure long lengths.
  3. Line up the 0 on the ruler with one end.

Example: Would you measure a pencil in cm or m? A pencil is short. Short things use centimeters. Answer: cm

Measuring in Arizona

In the Arizona Academic Standards, this is unit 4 of 16 in 2nd grade Math, after Adding to 100 and before Shapes.

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

    How long is the carrot?

    • 7 cm
    • 3 cm
    • 1 cm

  2. Question 2

    Would you measure a hallway in centimeters or meters?

    🚪
    • meters
    • centimeters

  3. Question 3

    Would you measure a ladybug in centimeters or meters?

    🐞
    • meters
    • centimeters

  4. Question 4

    How long is the caterpillar?

    • 2 cm
    • 5 cm
    • 8 cm

  5. Question 5

    How long is the spoon?

    • 1 cm
    • 12 cm
    • 7 cm

  6. Question 6

    How many centimeters make 1 meter?

    📏
    • 99
    • 95
    • 100

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