Maureen Curran and Mary Lou Aalbers

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MATH
Number Sense
ACTIVITY 1
Maureen Curran and Mary Lou Aalbers Hazelwood
School District
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NUMBER SENSE

• These lessons will be addressing the following
  state standards
• Develop, analyze, and explain procedures for
  computation and techniques for estimation. (MO
  2.3, 3.3)
• Check and explain the reasonableness of solutions
  strategies, and results. (MO 1.7, 3.3, 3.7, 4.1)
• Select appropriate methods of computation, such
  as mental arithmetic, estimation, calculator,
  computer, and paper/pencil to reflect upon
  solutions, strategies, and results. (MO 3.3, 3.6,
  3.7)

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• Teacher Page
• You will need to click the mouse to show the
  answers for activities. This will allow you to
  control the timing of answers shown.
• We suggest that students keep a journal and
  respond to questions in this presentation.
• It is critical for students to use writing skills
  to explain their answers.
• Please take time to discuss possible solutions to
  problems.

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Riddle me this and riddle me that You can solve
riddlesjust like that!
I am a prime number.
I am an odd number.
I am more than 6.
My digits add up to 4.
What number am I???
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Riddle me this and riddle me that You can solve
riddlesjust like that!
What number am I???
13
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Mystery Numbers Revisited
If you count by fives, I have two left over.
I am a multiple of 7.
The sum of my digits is an even number.
I am a composite number.
Whats the Mystery Number??
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Mystery Numbers Revisited
If you count by fives, I have two left over.
I am a multiple of 7.
The sum of my digits is an even number.
I am a composite number.
77
Whats the Mystery Number??
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Mystery Numbers Revisited
Now its YOUR turn! List five clues for your
mystery number in your journal. Give to a
partner to see if they can solve
it. 1. 2. 3. 4. 5.