Question
Find the following values without a calculator.

  1. _____ + 19 = 25
  2. _____ + 12 = 37
  3. _____ + 44 = 65
  4. _____ + 56 = 199
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. _____ + 19 = 25
  2. _____ + 12 = 37
  3. _____ + 44 = 65
  4. _____ + 56 = 199