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Other number prompts

These prompts have been used, to our knowledge, only rarely or not at all in classrooms. If you do use one with your class, please contact us and let us know your experiences.
Powers of 10
4 x 0.01 = 4 ÷ 100
  
Calculations 
Designed by Caitriona Martin
23 + 56 = 56 + 23
23 - 56 = 56 - 23
23 x 56 = 56 x 23
23 ÷ 56 = 56 ÷ 23
Decimals
The product of two decimals is one.
  
Fractional indices
Fractions
  
This prompt comes from division = subtraction?
on Don Steward's website.