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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 20 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 285 square units. One side is 3 units long. Split the area into 270 and 15. How long is the other side?
Answer:
2.A rectangle has an area of 504 square units. One side is 7 units long. Split the area into 490 and 14. How long is the other side?
Answer:
3.A rectangle has an area of 462 square units. One side is 6 units long. Split the area into 420 and 42. How long is the other side?
Answer:
4.A rectangle has an area of 435 square units. One side is 5 units long. Split the area into 400 and 35. How long is the other side?
Answer:
5.A rectangle has an area of 276 square units. One side is 3 units long. Split the area into 270 and 6. How long is the other side?
Answer:
6.A rectangle has an area of 882 square units. One side is 9 units long. Split the area into 810 and 72. How long is the other side?
Answer:

LessonPrint · 4.NBT.B.6 · Set 20 · free to copy for classroom use

Answer key — Divide with an Area Model

Set 20. Prints on its own sheet.

  1. 1.270 ÷ 3 = 90; 15 ÷ 3 = 5; 90 + 5 = 95 units
  2. 2.490 ÷ 7 = 70; 14 ÷ 7 = 2; 70 + 2 = 72 units
  3. 3.420 ÷ 6 = 70; 42 ÷ 6 = 7; 70 + 7 = 77 units
  4. 4.400 ÷ 5 = 80; 35 ÷ 5 = 7; 80 + 7 = 87 units
  5. 5.270 ÷ 3 = 90; 6 ÷ 3 = 2; 90 + 2 = 92 units
  6. 6.810 ÷ 9 = 90; 72 ÷ 9 = 8; 90 + 8 = 98 units

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