A more thorough introduction to the topics covered in this section can be found in the
Prealgebra chapter,
Decimals .
Name and write decimals
Decimals are another way of writing
fraction s whose denominators are powers of 10.
Notice that “ten thousand” is a number larger than one, but “one ten-thousand
th ” is a number smaller than one. The “th” at the end of the name tells you that the number is smaller than one.
When we name a whole number, the name corresponds to the place value based on the powers of ten. We read 10,000 as “ten thousand” and 10,000,000 as “ten million.” Likewise, the names of the
decimal places correspond to their fraction values.
[link] shows the names of the
place values to the left and right of the decimal point.
Place value of decimal numbers are shown to the left and right of the decimal point.
Look for the word “and”—it locates the decimal point.
Place a decimal point under the word “and.” Translate the words before “and” into the whole number and place it to the left of the decimal point.
If there is no “and,” write a “0” with a decimal point to its right.
Mark the number of decimal places needed to the right of the decimal point by noting the place value indicated by the last word.
Translate the words after “and” into the number to the right of the decimal point. Write the number in the spaces—putting the final digit in the last place.
Abiotic factors are non living components of ecosystem.These include physical and chemical elements like temperature,light,water,soil,air quality and oxygen etc