Question
Find the value of 1 unit.
  1. 1 u - 4 = 1
  2. 4 = 1 u - 4
  3. 7 - 1 = 1 u - 1
  4. 2 + 7 = 1 u - 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 value of 1 unit.
  1. 1 u - 4 = 1
  2. 4 = 1 u - 4
  3. 7 - 1 = 1 u - 1
  4. 2 + 7 = 1 u - 1