Upper and lower bounds in additive calculations

12 questions

1. An error interval for a number shows the ___ of possible values of the number.
2. Work out the lower and upper bounds of 560 rounded to the nearest 10
3. Work out the lower and upper bounds of 4.8 rounded to 1 decimal place.
4. ___ rounded to the nearest integer. The lower bound is 8.5 and the upper bound is 9.5
5. ___ rounded to 1 decimal place. The lower bound is 1.65 and the upper bound is 1.75
6. ___ rounded to 2 significant figures. The lower bound is 1250 and the upper bound is 1350
7. The numbers either end of an error interval are called the lower and upper ___.
8. A piece of string is measured as 10.2 cm correct to 1 decimal place. What are the lower and upper bounds?
9. A piece of string is measured as 10.2 cm correct to 1 decimal place. The lower and upper bounds are 10.15 and 10.25. What is the error interval?
10. The mass of a cat is 4.8 kg correct to 2 significant figures. What is the error interval?
11. Here are the error intervals for x and y: 24.5\leq{x}<25.5 and 9.5\leq{y}<10.5. What are the lower and upper bounds of x + y?
12. Here are the error intervals for x and y: 24.5\leq{x}<25.5 and 9.5\leq{y}<10.5. What are the lower and upper bounds of x - y?

License: OGL