Worksheet

Bakery Morning: Factor Pairs, Multiples, Prime and Composite

Grade 4 bakery practice: find factor pairs with tray arrays, test multiples of one-digit numbers, and sort numbers to 100 as prime or composite.

Grade 4MathInteractive · Printable

Aligned to4.OA.B.4

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What’s included

Single worksheet
Auto-graded online
1 Common Core standard
Printable answer key
12 questions
Classroom-ready

Details

Format: Interactive · Printable
Grade: Grade 4
Subject: Math
Question types: Fill in the blank, Multiple choice, Matching, Circle the answer, Sorting, Short answer

About this worksheet

What students practice

Students find all factor pairs of a whole number from 1 to 100 using arrays.
Students decide whether a number up to 100 is a multiple of a given one-digit number.
Students classify whole numbers up to 100 as prime or composite and explain why.

How to use

Give students square tiles or grid paper to build the tray layouts in the first section. Review the words factor, multiple, prime, and composite before students start the last section.

Curriculum

Common Core standard covered

4.OA.B.4

Find factor pairs and multiples for numbers 1 to 100 and decide whether a number is prime or composite.

Preview

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Bakery Morning: Factor Pairs, Multiples, Prime and Composite

Arrange treats on trays, pack them in boxes, and sort prime and composite numbers.

Tray layouts and factor pairs

The bakers put treats on trays in equal rows with none left over. Use factor pairs to plan each tray.

Baker Ana has 28 cookies. Fill in each tray layout, then count the factor pairs of 28.

1 row of cookies
2 rows of cookies
4 rows of cookies
Number of factor pairs of 28:

Rosa has 30 dinner rolls. She puts them on a tray in equal rows with none left over. Circle every number of rows she could make.

23456789101215

Theo has 48 muffins. He says the only factor pairs of 48 are 6 × 8 and 4 × 12. Which factor pairs did Theo miss?

A. 1 × 48 and 2 × 24 only
B. 1 × 48, 2 × 24, and 3 × 16
C. 3 × 16 and 5 × 10
D. 2 × 24 and 3 × 16 only

Baker Lin has 64 cupcakes. She wants a square tray, with the same number of rows as cupcakes in each row.

rows with cupcakes in each row

Match each number of treats to how many factor pairs it has. Count 2 × 6 and 6 × 2 as the same pair, and count a pair like 5 × 5 once.

A. 5 factor pairs
B. 1 factor pair
C. 3 factor pairs
D. 2 factor pairs

Boxes and multiples

The bakery packs treats in full boxes. Use multiples to decide which amounts work.

Muffins come in packs of 7. Write the next three multiples of 7.

7, 14, , ,

Bagels come in bags of 4. Circle every number of bagels that fills bags of 4 with none left over.

18243036425260667690

Donuts are packed in boxes of 8. Which number of donuts fills the boxes with none left over?

A. 52 donuts
B. 68 donuts
C. 72 donuts
D. 84 donuts

The baker fills 7 boxes with 9 scones in each box, so 7 × 9 = 63. Use the word bank to finish the sentence.

Word bank: factor · multiple

63 is a of 7, and 7 is a of 63.

Prime or composite?

A prime number has exactly two factors: 1 and itself. A composite number has more than two factors.

10.

Sort the numbers on the baker's order tickets.

291721293941515387

Prime	Composite

11.

Which number of pies is composite?

A. 57 pies
B. 31 pies
C. 43 pies
D. 61 pies

12.

Jada wants to put 37 brownies on a tray in equal rows, with at least 2 rows and at least 2 brownies in each row. Can she do it? Explain using the word prime or composite.