Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 10 + 7 = _____
- 20 + 4 = _____
- 10 + 15 = _____
- 30 + 40 = _____
(a)
10 + 7 = 17
(b)
20 + 4 = 24
(c)
10 + 15 = 25
(d)
30 + 40 = 70
Answer(s): 17, 24, 25, 70