Question
Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3)

  1. 28 - 9 = _____
  2. 81 - 23 = _____
  3. 91 - 10 = _____
2 m

Click button first when a symbol is required. X

Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3)

  1. 28 - 9 = _____
  2. 81 - 23 = _____
  3. 91 - 10 = _____