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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 18 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 296 square units. One side is 8 units long. Split the area into 240 and 56. How long is the other side?
Answer:
2.A rectangle has an area of 405 square units. One side is 9 units long. Split the area into 360 and 45. How long is the other side?
Answer:
3.A rectangle has an area of 336 square units. One side is 4 units long. Split the area into 320 and 16. How long is the other side?
Answer:
4.A rectangle has an area of 623 square units. One side is 7 units long. Split the area into 560 and 63. How long is the other side?
Answer:
5.A rectangle has an area of 594 square units. One side is 9 units long. Split the area into 540 and 54. How long is the other side?
Answer:
6.A rectangle has an area of 123 square units. One side is 3 units long. Split the area into 120 and 3. How long is the other side?
Answer:

LessonPrint · 4.NBT.B.6 · Set 18 · free to copy for classroom use

Answer key — Divide with an Area Model

Set 18. Prints on its own sheet.

  1. 1.240 ÷ 8 = 30; 56 ÷ 8 = 7; 30 + 7 = 37 units
  2. 2.360 ÷ 9 = 40; 45 ÷ 9 = 5; 40 + 5 = 45 units
  3. 3.320 ÷ 4 = 80; 16 ÷ 4 = 4; 80 + 4 = 84 units
  4. 4.560 ÷ 7 = 80; 63 ÷ 7 = 9; 80 + 9 = 89 units
  5. 5.540 ÷ 9 = 60; 54 ÷ 9 = 6; 60 + 6 = 66 units
  6. 6.120 ÷ 3 = 40; 3 ÷ 3 = 1; 40 + 1 = 41 units

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