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

  1. 10 + 9 = _____
  2. 20 + 1 = _____
  3. 10 + 14 = _____
  4. 30 + 31 = _____
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. 10 + 9 = _____
  2. 20 + 1 = _____
  3. 10 + 14 = _____
  4. 30 + 31 = _____