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Divide with an Area Model is a free printable Grade 4 math worksheet on finding a missing side by splitting the area into two parts, aligned to Common Core standard 4.NBT.B.6. It prints 6 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 23 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Divide with an Area Model

4.NBT.B.6

NameDate

Read carefully, then work out the answer.

1.A rectangle has an area of 168 square units. One side is 7 units long. Split the area into 140 and 28. How long is the other side?
Answer:
2.A rectangle has an area of 249 square units. One side is 3 units long. Split the area into 240 and 9. How long is the other side?
Answer:
3.A rectangle has an area of 756 square units. One side is 9 units long. Split the area into 720 and 36. How long is the other side?
Answer:
4.A rectangle has an area of 470 square units. One side is 5 units long. Split the area into 450 and 20. How long is the other side?
Answer:
5.A rectangle has an area of 144 square units. One side is 8 units long. Split the area into 80 and 64. How long is the other side?
Answer:
6.A rectangle has an area of 696 square units. One side is 8 units long. Split the area into 640 and 56. How long is the other side?
Answer:

LessonPrint · 4.NBT.B.6 · Set 23 · free to copy for classroom use

Answer key — Divide with an Area Model

Set 23. Prints on its own sheet.

  1. 1.140 ÷ 7 = 20; 28 ÷ 7 = 4; 20 + 4 = 24 units
  2. 2.240 ÷ 3 = 80; 9 ÷ 3 = 3; 80 + 3 = 83 units
  3. 3.720 ÷ 9 = 80; 36 ÷ 9 = 4; 80 + 4 = 84 units
  4. 4.450 ÷ 5 = 90; 20 ÷ 5 = 4; 90 + 4 = 94 units
  5. 5.80 ÷ 8 = 10; 64 ÷ 8 = 8; 10 + 8 = 18 units
  6. 6.640 ÷ 8 = 80; 56 ÷ 8 = 7; 80 + 7 = 87 units

Last reviewed 2026-09-05. Aligned to 4.NBT.B.6 of the Common Core State Standards for Mathematics.