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Telling Time Misconceptions
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Free App for Your iphone to Learn Mental Math Strategies

Our school’s guidance counselor came to me the other day and told me about an app she had discovered on the iphone–Mental Math Ninja.  This app teaches mental math strategies using videos all for free.  I learned some mental math strategies from watching these videos.  Just when I thought I had learned most of the mental math strategies there were from being a math coach and attending many workshops, I learned more!  Some of the videos included are:

  • Rapidly multiply by 11’s,
  • Calculate a 15% tip
  • The Secret to Mental Addition
  • Rapid Single Column Addition
  • Rapid Two Column Addition
  • Adding Money
  • Rapidly Multiply 2-digit Numbers
  • Square Numbers Ending in 5
  • Square Numbers in the 50’s
  • Square Numbers Close to 100
  • Mutiply 2-digit by 1-digit Numbers
  • Square any 2-digit Number
  • Multiply 3-digit by 1-digit Numbers
  • Multiply 3-digit by 2-digit Numbers
  • Multiply 3-digit by 3-digit Numbers
  • Divide by 0.5 or 5 or 50

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