Display the Missing Columns Master. Students are
shown building plans, volumes, and incomplete
number sentences. For each plan, they are to determine
the height of the missing piece and complete
the number sentence.
- How can you use a building plan to find the volume
of a building? (I can add all the numbers on
the building plan.)
- What if you knew the building's volume, but one of
the numbers on the plan that shows a column's
height was missing? How can you figure out what
that missing number is? (Strategies will vary.
Possible response: I can start with the volume
and subtract the other numbers on the plan from
it. The number I am left with is the missing number.
It tells the height of that column.)
Have students explain their strategies for finding the
height of the missing columns on the Missing Columns Master. Some will likely use subtraction
and some will use addition.
Assign the What Is the Volume pages in the Student
Activity Book. Students will count and add to find
the volume of the buildings, write number sentences,
and solve problems involving volume.
Use the What Is the Volume pages and the Feedback Box in
the Student Activity Book to assess students' abilities to
solve problems (e.g., part-whole, join) involving volume [E2];
apply the properties of addition (e.g., commutative,
associative) to write number sentences that represent the
volume of a building [E3]; recognize that different shapes can
have the same volume [E1, E6]; count and add cubes to find
volume [E8]; and show work [MPE5].
