Question

Round the following numbers to the number of significant figures indicated:

345 (2 s.f.) ___________
7850 (1 s.f.) ___________
24.68 (3 s.f) ___________
8.005 (3 s.f) ___________
0.005758 (3 s.f) ___________
1.25x1012 (2 s.f) ___________

Answer 1

1. 3.5
2. 9
3. 24.7
4. 8.01
5. 0.006
6. 13(1.25×1012=12.65)

Explanation:

Above we have simply looked the condition that where we put decimal point that gives your needed answer after round off.

For example:

we have to make 2 s.f from 345 so we kept decimal after 3 and we rounded off to make 3.5 from 3.45

Hope you got it