Share Zoo Lunches
Est. Class Sessions: 2Summarizing the Lesson
Use the display of Sharing Problems Master to present Question 5, a problem with leftovers:
Ask student pairs to discuss the problem and encourage them to draw pictures or use connecting cubes.
Ask:
Students may give the following responses:
- I gave each ape 4 carrots and there were 2 left over for another day.
- I gave each ape 4 carrots and since there were 2 left, I cut the 2 carrots in half and gave each ape 412 carrots.
- I gave 2 apes 5 carrots each and 2 apes 4 carrots each.
Discuss ways to write number sentences to represent problems with leftovers. The following list shows some ways students could represent Question 5:
- 18 ÷ 4 = 4 and 2 left over
- 18 ÷ 4 = 412 or 4 and a half
- 4 + 4 + 4 + 4 + 2 = 18
- 5 + 5 + 4 + 4 = 18
- 4 × 4 + 2 = 18
Use the display of the Sharing Problems Master to present Question 6:
Encourage students to draw pictures or use connecting cubes to solve the problem. Two vans can take 4 students and two vans can take 5 students.
Have students discuss when it makes sense to divide the leftovers and when it does not make sense. For example, carrots can be divided, but people cannot.
Note that we refer to leftovers instead of remainders since we try to use language that is already part of students’ vocabulary. You may wish to introduce the more formal term remainder, but be sure to link it to situations students understand.
Help students understand various ways to write division
number sentences with leftovers. For the problem below,
the student wrote 17 ÷ 3 = 5 + 1 (corrected by teacher to
2 left over). She indicated that she had 5 equal groups plus
2 left over, but without labels for the numbers, the number
sentence is incorrect. Encourage students to write the
number of equal groups and the number left over (e.g.,
17 ÷ 3 = 5 flowers and 2 leftovers).
Assign the Zoo Kitchen Problems in the Student Activity Book for students to complete individually to assess students’ understanding of division concepts. Display the Math Practices page in the Student Activity Book Reference section and encourage students to focus on Math Practices 1, 2, 5, and 6 as they complete the assessment.
