Short-Cut Math

100 and subtract 100 which equals 15 Solution add the number aliquot answer Proving answer Short casting out 9's cent change the number check your answer Checking Division column common denominator decimal point digit sum divide a number divide the number dividing by 100 divisible by 11 easy ending in zero equivalent to dividing Estimate the Answer evenly divisible factors faster and easier halve the number higher number Larger Divisors larger number last digit last two digits lower number Method for Multiplying Mixed Number Ending move the decimal multiples of 9 multiply a number Multiply or Divide multiply the number Multiplying and Dividing multiplying by 100 number by 100 number by 75 Number Divide number is evenly number multiplied number's digits numbers and subtract original number problem Proving the answer quotient short-cut Simplifying the Dividend small numbers Solution by steps Square a Number subtract the number Test for Divisibility whole number