Identify How Many Sig.Figs.
621
3000
1-4 (Depending on how the number has been approximated)
67,891 (to 1 significant figure)
70,000
6500 (to the nearest thousand)
7000
What do Significant Figures measure?
Accuracy
8082
4
4500
2-4 (Depending on how the number has been approximated)
845,454 (to 4 significant figures)
845,500
73,693 (to the nearest ten thousand)
70,000
How many digits are there?
10 (0,1,2,3,4,5,6,7,8,9)
4.0000
5
8000 (Rounded to the nearest thousand)
1
7972 (to 2 significant figures)
8000
74.915 (to the nearest tenth)
74.9
100,000 has been rounded to the nearest thousand. What is the largest number it could have been?
100,499
70.80010
7
540000 (Rounded to the nearest hundred)
4
0.00708196 (to 5 significant figures)
0.0070820
624,864,918 (to the nearest million)
625,000,000
100,000 has been rounded to the nearest thousand. What is the smallest number it could have been?
99,500
0.0000009
1
100,000 (Rounded to the nearest whole number)
6
0.99999999 (to 3 significant figures)
1.00
1.7354948 (to the nearest hundred thousandth)
1.73549
What is the difference between Estimation and Approximation?
We know the exact value when we approximate, but we choose to make it more simple. We do not know the exact value when we estimate, we make a guess based on prior knowledge.