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)
- 57
- 138
- 985
- 2639
(a)
57 (=) 60
(b)
138 (=) 140
(c)
985 (=) 990
(d)
2639 (=) 2640
Answer(s): 60, 140, 990, 2640