In October, Mrs. Anderson graded 12 homework assignments for each of her students.

Mrs. Anderson's Class Counts

Class Number of Students
1 22
2 18
3 16
4 24




Part A

About how many homework assignments did Mrs. Anderson grade in October? Use compatible numbers to estimate.

(1 point)
Responses

10

10

85

85

850

850

1,200

1,200
Question 2
(1 point)


Part B

What was the total number of assignments Mrs. Anderson graded for classes 1 and 3 in October?
Enter your answer in the box.

assignments

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1 answer

To estimate the total number of homework assignments Mrs. Anderson graded in October, we'll use compatible numbers.

Part A

  1. Number of Students in Each Class:

    • Class 1: 22 students
    • Class 2: 18 students
    • Class 3: 16 students
    • Class 4: 24 students
  2. Total Number of Students:

    • Total = 22 + 18 + 16 + 24 = 80 students
  3. Total Homework Assignments Graded:

    • Each student had 12 assignments.
    • Estimated total assignments = 80 students × 12 assignments = 960 assignments.

Therefore, the closest estimate using compatible numbers is 1,200.

Part B

To calculate the total number of assignments graded for classes 1 and 3:

  1. Class 1:

    • Number of students: 22
    • Assignments graded = 22 students × 12 assignments = 264 assignments.
  2. Class 3:

    • Number of students: 16
    • Assignments graded = 16 students × 12 assignments = 192 assignments.
  3. Total for Classes 1 and 3:

    • Total = 264 + 192 = 456 assignments.

Thus, Mrs. Anderson graded 456 assignments for classes 1 and 3 in October.