A1262289998GLeQa

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An alternative method of division
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Division with Remainder

• What does it mean to have a remainder?

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Mathematical language
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Exploration 3.19The Scaffolding Algorithm
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The standard (familiar) division algorithm

• gazinta
• Do these division problems using the base 10
  blocks.
• 295 13
• 1425 7

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• Now do the following problems with pictures of
  the blocks. Include explanations of your steps.
• 7505 19
• 4953 64

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Mental Division

• Some are easier to do in our heads than others
• 6000/30
• How about 152 divided by 8?

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Simplify
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Rules for order of operations

• Please parentheses from inside out
• excuse exponents
• my Dear multiplication and
• division from left to right
• Aunt Sally addition and
• subtraction from left to right

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Rules for order of operations

• Why do we have the rules?
• Where did the rules come from?

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Order of operations
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For Friday

• Finish pages 1 - 15 in your class notes packet.
• This will count as a project grade, not a
  homework grade.
• For each question, be sure to explain both how
  the student answered the question, and why the
  mathematics is appropriate.
• The length of the answer is not what is
  important it is the quality of the explanation.
• You also have some reading and problems from the
  textbook on section 3.4.

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Division with manipulatives