Admin What does DP and SF mean in maths?
In the GCSE exams for any of the sciences you could be asked to write an answer to a certain number of decimal places (d.p.) or significant figures (s.f.).
What does 3 DP mean in maths?
decimal places
Rounding to 3 decimal places (3 d.p)
What does round to 2 DP mean?
What Does it Mean to Round to Two Decimal Places? To round to two decimal places means to find the approximate value of a number up to the hundredths place, which is second to the right of the decimal point. It helps us to shorten the number and makes it easy for us to use it in calculations.
What is 1 SF in maths?
The first significant figure of a number is the first digit which is not zero. Hence the first significant figure of 20,499 is 2 and the first significant figure of 0.0020499 is 2. The second significant figure of a number is the digit after the first significant figure.
Does 0 count as decimal place?
If a zero is behind a decimal and is trailing a non-zero, then it is significant. E.g. 5.00 – 3 significant figures. If a zero is leading a number, before or after the decimal, it is not significant. If a zero is trailing a non-zero digit, but it is not behind a decimal, it is not significant.
What does 2 DP mean in maths?
When rounding using decimal places (dp), the degree of accuracy that is required is usually given. look at the first digit after the decimal point if rounding to one decimal place or the second digit for two decimal places. draw a vertical line to the right of the place value digit that is required.
How do you round to DP?
Rounding to decimal places
- look at the first digit after the decimal point if rounding to one decimal place or the second digit for two decimal places.
- draw a vertical line to the right of the place value digit that is required.
- look at the next digit.
- if it’s 5 or more, increase the previous digit by one.