Daily Archives: November 13, 2016


Mental Calculations – Getting the result fast Addition of 5 When adding 5 to a digit greater than 5, it is easier to first subtract 5 and then add 10. For example, 7 + 5 = 12. Also 7 – 5 = 2; 2 + 10 = 12. Subtraction of […]

Fast Arithmetic Tips