Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 10 + 3 = _____
- 20 + 2 = _____
- 10 + 17 = _____
- 30 + 30 = _____
(a)
10 + 3 = 13
(b)
20 + 2 = 22
(c)
10 + 17 = 27
(d)
30 + 30 = 60
Answer(s): 13, 22, 27, 60