Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 20 - 10 = _____
- 45 - 10 = _____
- 54 - 10 = _____
- 91 - 10 = _____
(a)
20 - 10 = 10
(b)
45 - 10 = 35
(c)
54 - 10 = 44
(d)
91 - 10 = 81
Answer(s): 10, 35, 44, 81