Column Addition

  1. First choose a random sum for example 546+982.
  2. Now write the number 546 and then 982 underneath it.
  3. Don’t forget to put the two under the six, the eighty under the forty and the nine hundred under the five hundred.
  4. Add together the six and the two, 6+2=8.
  5. Add together the forty and the eighty, 40+80=120.
  6. Add together the five hundred and the nine hundred, 500+900=1400, but you have an extra hundred from 120 so it equals 1500.
  7. You then have to add one thousand.
  8. Then you have to write the numbers in order, one thousand, five hundred, twenty and eight or 1528.

Column Subtraction

  1. First choose a random sum for example 156-32.
  2. Now write the number 156 and then 32 underneath it.
  3. This time make sure that the two is under the six, and the thirty under the fifty, but leave nothing under the one hundred.
  4. Subtract two from six, 6-2=4.
  5. Subtract thirty from fifty, 50-30=20
  6. Leave the 100 as it is.
  7. 156-32=124