Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 + 13 = _____
- 3 + 15 = _____
- 39 + 43 = _____
- 69 + 12 = _____
(a)
2 + 13 = 15
(b)
3 + 15 = 18
(c)
39 + 43 = 82
(d)
69 + 12 = 81
Answer(s): 15, 18, 82, 81