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

  1.  311 + 311 = _____
  2. 26 + 46 = _____
  3. _____ + 78 = 1
  4. 67 + _____ = 1
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.
(Do not simplify the answer.)

  1.  311 + 311 = _____
  2. 26 + 46 = _____
  3. _____ + 78 = 1
  4. 67 + _____ = 1