Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 423 + 6 = ______
- 25 + 31 = _____
- 231 + 228 = _____
- 3670 + 519 = _____
(a)
423 + 6 = 429
(b)
25 + 31 = 56
(c)
231 + 228 = 459
(d)
3670 + 519 = 4189
Answer(s): 429, 56, 459, 4189