Worksheet

Mini-Golf Course Builders: Split, Multiply, and Add

Grade 3 area of rectilinear shapes: split L-, T-, and U-shaped mini-golf greens into rectangles, find each area, and add the parts.

Grade 3MathInteractive · Printable

Aligned to3.MD.C.7.d

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What’s included

Single worksheet
Auto-graded online
1 Common Core standard
Printable answer key
10 questions
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Details

Format: Interactive · Printable
Grade: Grade 3
Subject: Math
Question types: Fill in the blank, Multiple choice, Matching, Short answer, Drawing

About this worksheet

What students practice

Students find the area of a shape made of rectangles by splitting it into rectangles and adding.
Students show that two different ways of splitting a shape give the same total area.
Students find and explain mistakes in area answers for shapes made of rectangles.

How to use

Use after students can multiply side lengths to find area. Have them trace each part in a different color before writing its multiplication fact.

Curriculum

Common Core standard covered

3.MD.C.7.d

Find areas of shapes made of rectangles by splitting them into rectangles and adding.

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Mini-Golf Course Builders: Split, Multiply, and Add

Find the area of L-, T-, and U-shaped putting greens by breaking them into rectangles.

Greens split into rectangles

Each green is split into rectangles. Find the area of each part. Then add the parts.

Hole 1 is shaped like an L. Each small square is 1 square foot.

Part A: 3 × 6 = square feet
Part B: 4 × 3 = square feet
Whole green: square feet

Hole 2 is shaped like a T.

Part A: square feet
Part B: square feet
Whole green: square feet

Hole 3 is shaped like a U. Each small square is 1 square foot.

Which shows a correct way to find the area of the whole green?

A. 7 × 5 = 35 square feet
B. (2 × 5) + (3 × 2) = 16 square feet
C. (2 × 5) + (3 × 3) + (2 × 5) = 29 square feet
D. (2 × 5) + (3 × 2) + (2 × 5) = 26 square feet

Different ways to split

There is more than one way to split a green into rectangles.

Mia splits Hole 4 into parts A and B.

Part A: square feet
Part B: square feet
Mia's total: square feet

Kofi splits the same green a different way. His top piece is 2 feet wide and 3 feet tall. His bottom piece is 6 feet wide and 2 feet tall.

Top piece: 2 × 3 = square feet
Bottom piece: 6 × 2 = square feet
Kofi's total: square feet

Compare Mia's total and Kofi's total for Hole 4. Which is true?

A. Mia's way gives more area because her part A is taller.
B. Kofi's way gives more area because his bottom piece is longer.
C. Both ways give the same area because they cover the same green.
D. Only one of them can be right because a shape can be split only one way.

Each small square is 1 square foot. Match each green to its area.

Hole 5
Hole 6
Hole 7

A. 21 square feet
B. 14 square feet
C. 20 square feet
D. 16 square feet

Build your own course

Use what you know to plan and check mini-golf greens.

Turf comes in squares that are 1 foot on each side. Ms. Park needs to cover Hole 8 with turf.

Part A needs squares of turf.
Part B needs squares of turf.
In all, Ms. Park needs squares of turf.

Eli looks at Hole 9. He says the area is 7 × 5 = 35 square feet because the green is 7 feet wide and 5 feet tall.

What mistake did Eli make? Find the correct area.

10.

Design your own hole. Shade a green made of two rectangles that covers exactly 12 square feet. Each small square is 1 square foot.