Prime or Composite?
Resource Overview Quantile® Measure:
740Q
Skill or Concept:
Understand that many whole numbers factor in different ways. (QT‐N‐163) Find factors, common factors, and the greatest common factor of numbers; explain. (QT‐N‐222) Identify prime and composite numbers less than 100. (QT‐N‐223)
Excerpted from:
The Math Learning Center PO Box 12929, Salem, Oregon 97309‐0929 www.mathlearningcenter.org © Math Learning Center
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© The Math Learning Center
date
12
example
Number
2
1
12
6
12
12
3
Labeled Quick Sketch
12
4
3 x 4 = 12
2 x 6 = 12
1 x 12 = 12
Multiplication Sentence for Each Pair of Factors
(Continued on back.)
prime or composite?
Prime or Composite?
For each of the numbers below: • use your tiles to build all the possible rectangles that can be formed with that number. • make a labeled quick sketch to show each rectangle • record a multiplication sentence for each pair of factors. • circle the correct word to tell whether the number is prime or composite
1
You will need square-inch tiles to complete these sheets.
Prime or Composite?
Independent Worksheet
Set A2 H Independent Worksheet 1
name
Set A2 Number & Operations: Primes, Composites & Common Factors Blackline Run a class set
Bridges in Mathematics Grade 5 Supplement • A2.11
A2.12 • Bridges in Mathematics Grade 5 Supplement
29
33
c
18
b
1a
Number
Labeled Quick Sketch
Independent Worksheet 1 Prime or Composite? (cont.)
Multiplication Sentence for Each Pair of Factors
(Continued on next page.)
prime or composite?
prime or composite?
prime or composite?
Prime or Composite?
Set A2 Number & Operations: Primes, Composites & Common Factors Blackline Run a class set
© The Math Learning Center
© The Math Learning Center
42
Labeled Quick Sketch
Josef says that if you can only build 1 rectangle for a number, that means it’s prime. Do you agree with him or not? Use numbers, words, and/or labeled sketches to explain your answer.
2
1d
Number
Independent Worksheet 1 Prime or Composite? (cont.)
name
Multiplication Sentence for Each Pair of Factors
prime or composite?
Prime or Composite?
Prime Numbers between 20 and 30
Composite Numbers between 20 and 30
List all the prime numbers between 20 and 30 in the left-hand box below. List all the composite numbers between 20 and 30 in the right-hand box below. Use your tiles to help decide which are prime and which are composite
3
date
Set A2 Number & Operations: Primes, Composites & Common Factors Blackline Use anytime after Set A2 Activity 2. Run a class set
Bridges in Mathematics Grade 5 Supplement • A2.13
A2.14 • Bridges in Mathematics Grade 5 Supplement
© The Math Learning Center
