Question
Find the following values without a calculator.
Do not simplify the answer.

  1. 28 + 18 = _____
  2. 15 + _____ = 25
  3. _____ + 19 = 1
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

(c)

Click button first when a symbol is required. X

Find the following values without a calculator.
Do not simplify the answer.

  1. 28 + 18 = _____
  2. 15 + _____ = 25
  3. _____ + 19 = 1