Approximate the irrational number -/8 to two decimals
2 answers
Please check for typo.
If that is an attempt at √8, your calculator will show you that
√8 ≈ 2.828427
So round that to two decimal places.
If you don't want to use a calculator, you can always extract the root by hand (google can show you how), or start guessing.
2^2 = 4
3^2 = 9
So you know it will be close to 3
2.8^2 = 7.84
2.9^2 = 8.41
So you can see it will be close to 2.8
2.82^2 = 7.9524
2.83^2 = 8.0089
So it is clearly closer to 2.83 than 2.82
√8 ≈ 2.828427
So round that to two decimal places.
If you don't want to use a calculator, you can always extract the root by hand (google can show you how), or start guessing.
2^2 = 4
3^2 = 9
So you know it will be close to 3
2.8^2 = 7.84
2.9^2 = 8.41
So you can see it will be close to 2.8
2.82^2 = 7.9524
2.83^2 = 8.0089
So it is clearly closer to 2.83 than 2.82
3 answers