Accuracy does not improve with addition, subtraction, multiplication, or division. The accuracy of an answer is determined by the lowest level of accuracy of the original numbers being added, subtracted, multiplied, or divided. SIGNIFICANT FIGURES AND ROUNDING FOR ACCURACYĪ decimal place indicates the accuracy of the given number. Move the decimal point three places to the left, remembering that whole numbers have a decimal point at the end. There is one zero in the 10, so move the decimal point in the 100 to the left by one place. To divide by a factor of 10, count the number of zeros in the divisor or denominator and move the decimal point that many spaces to the left.Ĭonsider 100/10, which can be written 100.0/10.0. This fact allows for division using these numbers to work by simply moving the decimal place. Note that the numbers 10, 100, 1000, 10,000 and so on are written similarly except for the number of "0"s between the first digit and the decimal point. The numbers to the right of the decimals represent tenths (0.1), hundreds (0.01), thousands (0.001), and so on down to infinitesimally small numbers.Īll whole numbers (called integers) have a decimal point at the end. The decimal point comes after the ones position. The figure below is similar to the chart for large numbers in Section 1.1.
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