Approximate calculations. Approximation error
Answers are for parents and teachers.
1
Exact value 250, approximate value 240. Find the error.
10
2
Find the error of replacing 7/8 by 0.88.
1/200
3
A library has 1 175 books. One person says “about 1 200”, another says “1 100”. Whose answer is more accurate?
The first: error 25, versus 75 for the second.
4
A stick is measured as 12.4 cm and its exact length is 12.0 cm. What is the error?
0.4 cm
5
Is the number of stars on the flag of Uzbekistan exact or approximate? Explain.
Exact: the stars are counted, there are 12 of them.