Question
Find the following values without a calculator.

  1. 10 + _____ = 27
  2. 25 + _____ = 60
  3. 66 + _____ = 85
  4. 59 + _____ = 93
4 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

(d)

Click button first when a symbol is required. X

Find the following values without a calculator.

  1. 10 + _____ = 27
  2. 25 + _____ = 60
  3. 66 + _____ = 85
  4. 59 + _____ = 93