Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 + 42 = _____
- 30 + 22 = _____
- 28 + 40 = _____
- 52 + 47 = _____
(a)
7 + 42 = 49
(b)
30 + 22 = 52
(c)
28 + 40 = 68
(d)
52 + 47 = 99
Answer(s): 49, 52, 68, 99