Lesson 7 Measure Length with Different Length Units

    • Let’s measure the same object using different length units.

Warm-up Notice and Wonder: Large Cubes and Small Cubes

What do you notice?
What do you wonder?

Markers with cubes below. Black marker, 6 connecting cubes. Green marker, 12 small cubes.

Activity 1 Measure With Different Objects

  1. Circle the 3 objects you will use:

    1. connecting cubes

    2. small paper clips

    3. small cubes

    4. large paper clips

  2. Measure the length of Jeison’s foot with each object you chose and fill in the table.

     object

    length

Activity 2 Measure the Teacher’s Shoe

  1. Andre measured his teacher’s shoe and said it was 15 connecting cubes long.

    Shoe. Underneath from toe to heel, 15 connecting cubes all the same size in a tower.

    Is his measurement accurate?

    Why or why not?

  2. Jada measured her teacher’s shoe and said it was 12 connecting cubes long.

    Shoe. Underneath from toe to heel, 12 connecting cubes all the same size, most cubes have space in between.

    Is her measurement accurate?

    Why or why not?

  3. Clare measured her teacher’s shoe and said it was 30 small cubes long.

    Shoe. Underneath from toe to heel, 30 small cubes, same size, no space between the cubes.

    Is her measurement accurate?

    Why or why not?

  4. Kiran measured his teacher’s shoe and said it was 19 cubes long.

    Shoe. Underneath from toe to heel, 19 cubes, two different sizes, no space in between the cubes.  

    Is his measurement accurate?

    Why or why not?

Practice Problem

Problem 1

Jada and Han measure the rectangle.

Objects. Top, 3 paper clips lined up end to end. Middle, rectangle. Bottom, 8 connecting cubes. Objects in each row start and end at the same place.

Jada says the rectangle is 3 long.

Han says that it is 8 long.

Explain how both Jada and Han can be correct.