IQ Test Labs

  Addition - Instructions for easier and faster addition.   Subtraction - Rounding off and adjusting.   Divisibility tests - Discover which numbers qualify as factors.   Division - Division methods and veryfying results.   Multiplication - Tips for multiple digits and large numbers.   Squaring integers - Formulas and tips covering multiple ranges.   Fractions to decimals - Convert fractions to decimals via tabular data.