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Area of Two Rectangles Joined is a free printable Grade 3 math worksheet on splitting a shape into two rectangles and adding their areas, aligned to Common Core standard 3.MD.C.7. 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.

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Area of Two Rectangles Joined

3.MD.C.7

NameDate

Work out each area. Show both parts.

LessonPrint · 3.MD.C.7 · Set 1 · free to copy for classroom use

Answer key — Area of Two Rectangles Joined

Set 1. Prints on its own sheet.

  1. 1.6 × 7 = 42; 4 × 2 = 8; 42 + 8 = 50 square feet
  2. 2.8 × 6 = 48; 3 × 2 = 6; 48 + 6 = 54 square meters
  3. 3.5 × 8 = 40; 3 × 3 = 9; 40 + 9 = 49 square meters
  4. 4.5 × 4 = 20; 3 × 3 = 9; 20 + 9 = 29 square meters
  5. 5.5 × 6 = 30; 4 × 5 = 20; 30 + 20 = 50 square feet
  6. 6.5 × 7 = 35; 6 × 2 = 12; 35 + 12 = 47 square feet

Questions about Area of Two Rectangles Joined

What does the Area of Two Rectangles Joined worksheet cover?

It practices splitting a shape into two rectangles and adding their areas — 6 questions for Grade 3, all on Common Core 3.MD.C.7: Find area by multiplying side lengths. The instruction to students is “Work out each area. Show both parts”, and the answer key follows on the next sheet.

Which Common Core standard does Area of Two Rectangles Joined practice?

CCSS.MATH.CONTENT.3.MD.C.7 — 3.MD.C.7, under Measurement & Data for Grade 3. The published standard reads: “Relate area to the operations of multiplication and addition.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Area of Two Rectangles Joined is written for Grade 3, typically ages 8-9. It is one of the sheets on 3.MD.C.7, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.

Does Area of Two Rectangles Joined come with an answer key?

Yes. All 6 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.

How many different versions of Area of Two Rectangles Joined can I print?

25 — one per student, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.

Is Area of Two Rectangles Joined free to print and photocopy?

Yes. Area of Two Rectangles Joined, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.

More practice for 3.MD.C.7

Find area by multiplying side lengths.

All Grade 3 worksheets

Last reviewed 2026-09-05. Aligned to 3.MD.C.7 of the Common Core State Standards for Mathematics.