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1. 
What is the value of 5 in 456?
2. 
Round 85 to the nearest 10
3. 
Round 404 to the nearest 10
4. 
Round 9978 to the nearest 100
5. 
Round 16.47 to 1 d.p.
6. 
Round 8.005 to 2 d.p.
7. 
Round 423500 to 2 s.f.
8. 
Round 0.0765 to 2 s.f.
9. 
Estimate the following equation (21.6 x 10.1)/21.4
10. 
estimate the following (82.1+70.2)/0.22
11. 
What is the lower bound of 7 if it has been rounded to the nearest WHOLE number?
12. 
what is the upper bound of 7 if it has been rounded to the nearest whole number?
13. 
What is the value of 2 in 12?
14. 
What is the value of 2 in 12?