4. Thousandths follow a similar pattern. They have three digits
after the decimal point. The decimal 0.749 is pronounced "seven
hundred forty-nine thousandths" or "zero point seven forty-nine".
There may be zeros after the decimal point. The decimal 0.064
is pronounced "sixty-four thousandths" or "zero point zero sixty-
four".
A decimal number may be larger than 1. The word and may be
used to indicate the decimal point so it should not be used in
other parts of the name of the decimal. The decimal 234.987
could be pronounced Two hundred thirty-four AND nine hundred
eighty-seven thousandths.
5.
6. • Decimals are fractional numbers. The decimal 0.3 is
the same as the fraction 3/10. The number 0.78 is a
decimal that represents 78/100.
• Adding Decimals is just like adding other numbers.
• Always line up the decimal points when adding
decimals.
• Remember to put the decimal point in the proper
place in your answer.
7. Subtracting Decimals is just like subtracting other
numbers.
Always line up the decimal points when subtracting
decimals.
Remember to put the decimal point in the proper
place in your answer
8.
9.
10.
11.
12.
13.
14.
15.
16. • Example: 68 is what percent of 87?
• Divide the first number by the second (e.g. 68 ÷ 87
= 0.7816)
• Multiply the answer by 100 (Move decimal point
two places to the right) (e.g. 0.7816*100 = 78.16)
• Round to the desired precision (e.g. 78.16 rounded
to the nearest whole number = 78)
• Follow the answer with the % sign (e.g. 68 is 78% of
87)
17. • Decimals are a type of fractional number. The decimal 0.5
represents the fraction 5/10. The decimal 0.25 represents the
fraction 25/100. Decimal fractions always have a denominator
based on a power of 10.
• We know that 5/10 is equivalent to 1/2 since 1/2 times 5/5 is
5/10. Therefore, the decimal 0.5 is equivalent to 1/2 or 2/4, etc.
• Some common Equivalent Decimals and Fractions: 0.1 and 1/10
• 0.2 and 1/5
• 0.5 and 1/2
• 0.25 and 1/4
• 0.50 and 1/2
• 0.75 and 3/4
• 1.0 and 1/1 or 2/2 or 1
18. • Do the following steps to convert a fraction to a
decimal:
For example: Convert 4/9 to a decimal.
• Divide the numerator of the fraction by the
denominator (e.g. 4 ÷ 9=0.44444)
• Round the answer to the desired precision.
19. • Do the following steps to convert a fraction to a
percent:
For example: Convert 4/5 to a percent.
• Divide the numerator of the fraction by the
denominator (e.g. 4 ÷ 5=0.80)
• Multiply by 100 (Move the decimal point two places
to the right) (e.g. 0.80*100 = 80)
• Round the answer to the desired precision.
• Follow the answer with the % sign (e.g. 80%)
20. • Do the following steps to convert a percent to a
fraction:
For example: Convert 83% to a fraction.
• Remove the Percent sign
• Make a fraction with the percent as the numerator
and 100 as the denominator (e.g. 83/100)
• Reduce the fraction if needed
