Question
Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)

  1. 20 - 10 = _____
  2. 41 - 10 = _____
  3. 53 - 10 = _____
  4. 90 - 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, 4)

  1. 20 - 10 = _____
  2. 41 - 10 = _____
  3. 53 - 10 = _____
  4. 90 - 10 = _____