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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 10 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 160 square units. One side is 5 units long. Split the area into 150 and 10. How long is the other side?
Answer:
2.A rectangle has an area of 153 square units. One side is 3 units long. Split the area into 150 and 3. How long is the other side?
Answer:
3.A rectangle has an area of 297 square units. One side is 9 units long. Split the area into 270 and 27. How long is the other side?
Answer:
4.A rectangle has an area of 120 square units. One side is 8 units long. Split the area into 80 and 40. How long is the other side?
Answer:
5.A rectangle has an area of 408 square units. One side is 8 units long. Split the area into 400 and 8. How long is the other side?
Answer:
6.A rectangle has an area of 282 square units. One side is 6 units long. Split the area into 240 and 42. How long is the other side?
Answer:

LessonPrint · 4.NBT.B.6 · Set 10 · free to copy for classroom use

Answer key — Divide with an Area Model

Set 10. Prints on its own sheet.

  1. 1.150 ÷ 5 = 30; 10 ÷ 5 = 2; 30 + 2 = 32 units
  2. 2.150 ÷ 3 = 50; 3 ÷ 3 = 1; 50 + 1 = 51 units
  3. 3.270 ÷ 9 = 30; 27 ÷ 9 = 3; 30 + 3 = 33 units
  4. 4.80 ÷ 8 = 10; 40 ÷ 8 = 5; 10 + 5 = 15 units
  5. 5.400 ÷ 8 = 50; 8 ÷ 8 = 1; 50 + 1 = 51 units
  6. 6.240 ÷ 6 = 40; 42 ÷ 6 = 7; 40 + 7 = 47 units

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