Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 10 + 9 = _____
- 20 + 1 = _____
- 10 + 14 = _____
- 30 + 31 = _____
(a)
10 + 9 = 19
(b)
20 + 1 = 21
(c)
10 + 14 = 24
(d)
30 + 31 = 61
Answer(s): 19, 21, 24, 61