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Number prompts

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Place value and decimals
im  Place value inquiry
 
Calculations with decimals
im  60 x 1.2 = 60 + 12
   
Calculations: multiplication 

im  24 x 21 = 42 x 12 
im  21 x 534 > 21 x 53 x 4 > 2 x 1534

Calculations: division
im  Division inquiry
      
Prime numbers
im  Prime factors inquiry
   
Factors and multiples
im  The product of the factors of 24 equals 244.
im  The product of two numbers divided by their highest common factor is their lowest common multiple.
im  There are four pairs of integers which have a highest common factor of 6 and a lowest common multiple of 180. 
        
Fractions
im  The sum of two fractions equals their product.
im  Adding fractions inquiry
im  The sum of two unit fractions is a unit fraction.
im  Any fraction can be converted to a decimal and any decimal can be converted to a fraction.
im  Fraction of a number inquiry

P
ercentages
im  40% of 70 = 70% of 40
im  Percentage increase and decrease inquiry
   
  
Ratio 
im  Ratio inquiry 
   
Surds
   
im  Surds inquiry
  
Indices (exponents)
im  Indices inquiry
im  Laws of exponents inquiry
im  Base and index inquiry
  
Inequalities
im  Inequalities inquiry
  
im  Other number prompts
A collection of other number prompts that have the potential to generate classroom inquiry.