Watch Video on Fraction to Decimal - Math Help
Thursday, June 18th, 2009
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/fractiontodecimal.php Students learn to convert fractions to decimals. For example, to convert the fraction 7/10 to a decimal, first read the fraction as “7 tenths”. Next, since the tenths place is one place to the right of the decimal point, 7 tenths can be written as the decimal 0.7. To convert 11/20 to a decimal, first find a fraction that is equivalent to 11/20 that has a denominator of 100, so multiply both the numerator and denominator by 5, to get 55/100. Next, read the fraction as “55 hundredths”, which can be written as 0.55.
Duration : 0:1:14
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/convertdecimaltofraction.php Students use the place value chart to convert decimals to fractions or mixed numbers. The given decimals are taken to the tenths, hundredths, thousandths, or ten-thousandths places, and the resulting fractions or mixed numbers must sometimes be reduced to lowest terms. For example, the decimal 0.4 means 4 tenths, or 4/10, which reduces to 2/5.
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/percenttodecimal.php Students learn to write percents as decimals and decimals as percents. For example, to write 82% as a decimal, think of 82% as 82/100, and remember that dividing by 100 moves the decimal point two places to the left, to get 0.82. So 82% can be written as the decimal 0.82. Since a percent can be written as a decimal by moving the decimal point two places to the left, a decimal can be written as a percent by moving the decimal point two places to the right. For example, to write 0.4 as a percent, move the decimal point two places to the right to get 40. So 0.4 can be written as 40%.
How to properly read a decimal number and identify the place values.
Expressing percentages as decimals. Expressing decimals as percentages.
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/dividingdecimals.php Students learn to divide a decimal by a decimal by first multiplying both decimals by the power of 10 that changes the second decimal to a whole number. For example, to divide 0.16 by 0.8, first multiply both decimals by 10, to get 1.6 8. Next, divide the decimal by the whole number in the same way that one would divide a whole number by a whole number (using long division). However, at the end of the problem, the decimal point is brought straight up from the decimal that is inside the division symbol to the answer that is written on top of the division symbol.
Adding decimals
How to express a fraction as a decimal