Find the following values without a calculator. Round off the following numbers to the nearest 10.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 20
- 451
- 640
- 2316
(a)
20 (=) 20
(b)
451 (=) 450
(c)
640 (=) 640
(d)
2316 (=) 2320
Answer(s): 20, 450, 640, 2320