How do you cast out nines division? - Answers

Let's say you have 6798/56....Your answer is 121 R 22 Casting out nines will confirm this is the correct answer. To perform casting out nines... 6798 = 121 * 56 + 22 (note that this equation merely sets forth the equation you would use if you were to check your work by multiplying). 6798 = 121 * 56 + 22 1. Reduce all numbers to a single digit by adding and remove 9s or any two number combinations that equal 9. 6798 becomes 21 (after we remove the 9 and add 6+7+8) = 21 becomes 3 when we add 2+1. 121 becomes 4 (by adding 1+2+1) 56 becomes 11 and then 2 (when we add 1+1) 22 becomes 4 (when we add 2+2) So our equation now looks like the following: 6798 = 121 * 56 + 22 (3) = (4) * (2) + 4 3 = (8) + 4 3 = 12 which becomes 3 when we add 1+2 3=3 (Our answer is correct).