Accurately known digits along with first doubtful digit are called significant figures.
There are two types of significant figures, measured and exact. Numbers are often rounded to avoid reporting insignificant figures. Numbers can also be rounded merely for simplicity rather than to indicate a given precision of measurement.
There are 5 significant figures in 70700 as the zeros are between and after the numbers.
5 significant figures.
4 significant figures.
5 significant figures.
When multiplying numbers with significant figures, round the final answer to match the number with the least significant figures in the original numbers.
There are two types of significant figures, measured and exact. Numbers are often rounded to avoid reporting insignificant figures. Numbers can also be rounded merely for simplicity rather than to indicate a given precision of measurement.
When dividing numbers, the result should have the same number of significant figures as the number with the fewest significant figures in the calculation. Round the final answer to match the least number of significant figures in the original numbers.
When multiplying numbers with significant figures, count the total number of significant figures in each number being multiplied. The result should have the same number of significant figures as the number with the fewest significant figures. Round the final answer to that number of significant figures.
The answer will usually depend on the number of significant figures in the numbers from which there numbers were derived.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
231.57 has five significant figures/numbers. All the numbers in 231.57 are significant.
There are 5 significant figures in 70700 as the zeros are between and after the numbers.
3 significant figures.
It has five significant figures.
7 significant figures.
3 significant figures.