HOW DO I HELP THESE KIDS

REAL WORLD PROBLEMS

• Accurate or estimate?
• Mentally, pen and paper, or calculator?

HOW DID YOU DO IT?

54+26

87-22

63-38

ADDITION AND SUBTRACTION PROBLEMS

• Counting on or counting back
• Doubles
• Doubles +\- 1
• Front end addition

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• Making Ten
• Compensation

TEN FRAMES

BANKER, BUILDER

17+59
44+37
25+66

TREE DIAGRAM

Maria baked 6 cookies today. She baked some yesterday too. Now she has 13 cookies. How many did she bake yesterday?

What would you key into your calculator to find the answer?

HUNDRED CHART

• 35+54

62+17
59+27

65-32
82-14

MA AND PA KETTLE

MULTIPLICATION STRATEGIES

• 2x: Doubles
• 5x: Clock
• 0/1x: Easy Peasy
• 9x: Nifty Nines, Finger Trick

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• 4x: Double Double
• 3x: Double Plus One
• 9 facts left to memorize

6x6 is magic tricks,
Abracadabra! 36!
7 and 7 are doing fine,
7x7 is 49.

THINK ADDITION/MULTIPLICATION

MULTIPLYING LARGE NUMBERS

• Array
• FOIL
• Lattice
• Double & Half

DIVIDING LARGE NUMBERS

• Partial Quotients

FINAL THOUGHTS

• Look for patterns
• Strategies
• Standard algorithms
• Encourage recall

KNOW YOUR STUFF

KNOW WHO YOU'RE STUFFING

STUFF THEM ELEGANTLY