Limits of Accuracy
Maths: Edexcel IGCSE Higher, topic 1.8.4
Upper and Lower Bounds - Addition
Max weighs 65kg (to 2 significant figures). Andy weighs 72kg (to 2 significant figures). What are the upper and lower bounds for their total weight?
Write out individual bounds
Smallest weight - step 1
Smallest weight - step 2
Smallest weight - step 3
Largest weight - step 1
Largest weight - step 2
Largest weight - step 3
Total weight bounds
Upper and Lower Bounds - Subtraction
The total length of a rope is 3m (to 1 significant figure). The length of rope cut off is 0.4m (to 1 decimal place). What are the upper and lower bounds for the remaining length of rope?
Write out individual bounds
Smallest remaining length - step 1
Smallest remaining length - step 2
Smallest remaining length - step 3
Largest remaining length - step 1
Largest remaining length - step 2
Largest remaining length - step 3
Remaining length bounds
Test yourself on Limits of Accuracy
How do you find the upper bound of an addition x + y?
How do you find the lower bound of an addition x + y?
How do you find the lower bound of a subtraction x − y?
How do you find the upper bound of a subtraction x − y?
If W = v - u, and the bounds for v and u are 4 < v < 5 and 2 < u < 6, then what is the maximum possible value of W?