Problem solving with rounding, estimation and bounds

11 questions

1. An ___ interval for a number x shows the range of possible values of x.
2. Considering the maximum number of boxes to safely fit onto a lorry. Which of the following should be used? (Where l represents the capacity of the lorry and b represents the mass of a box?
3. A sack contains 50 kg of rice correct to the nearest kg. What are the lower and upper boundaries of the rice?
4. A sack contains 50 kg of rice correct to the nearest kg. This is put into smaller bags containing 1 kg correct to 0.01 kg. What are the lower and upper boundaries of the bags?
5. A sack contains 50 kg of rice correct to the nearest kg. This is put into smaller bags containing 1 kg correct to 0.01 kg. Which calculation is correct to find the minimum number of bags produced?
6. A quick estimate for a calculation is obtained from using ___ values, often rounded to 1 significant figure.
7. Match each to the appropriate measure.
8. Which of the following are reasonable approximations?
9. Using estimation only which of the following is the correct answer to {{106^2\times1.587}\over35.06}
10. Estimate the value of {23.87\times105.7}\over38.942
11. Andeep's dog is fed twice a day. Each meal weighs 175 g. A bag of food contains 7.5 kg. Estimate how many days the bag of food will last.

License: OGL