Naming decimal numbers
Grade 4 students learn to name decimal numbers by splitting them at the decimal point and reading each part in Saxon Math Intermediate 4. To read 12.25, say the whole number (twelve), then the word and for the decimal point, then name the decimal part with its place value (twenty-five hundredths). Writing 45.07 in words gives forty-five and seven hundredths because the last digit 7 sits in the hundredths place. This Chapter 4 skill also covers converting between word form and decimal notation, using the word and as the key indicator of the decimal point.
Key Concepts
Property To name a decimal number greater than 1, like $12.25$, you mentally split it at the decimal point. First, name the whole number part. Second, say the word 'and'. Third, name the fraction part by reading the digits and stating the place value (tenths, hundredths, etc.).
Example The number $10.75$ is read as 'ten and seventy five hundredths'. The number $6.4$ is read as 'six and four tenths'. The number $8.02$ is read as 'eight and two hundredths'.
Explanation Reading decimals is like introducing a friend's family! First, you say the whole number's name, like 'twelve'. Then, you use 'and' as the bridge to the rest of the family. Finally, you introduce the decimal part, like 'twenty five hundredths'. This simple, three step introduction will make you sound like a math with every single time.
Common Questions
How do you name a decimal number in words?
Read the whole number part first, say the word and for the decimal point, then read the digits after the decimal and state the place value of the last digit. For example, 6.4 is six and four tenths, and 8.02 is eight and two hundredths.
What does the word and mean in a decimal number?
In a decimal number written in words, the word and marks the position of the decimal point. Everything before and is the whole number, and everything after and is the decimal fraction part.
How do you write eight and five hundredths as a decimal?
The whole number eight goes before the decimal point. Hundredths requires two decimal places, so five is written as 05 to fill both spots. The result is 8.05, not 8.5.
What is the difference between tenths and hundredths in decimals?
Tenths means one decimal place (like 0.6), while hundredths means two decimal places (like 0.06). The place value of the last digit after the decimal point determines which term to use.
What textbook covers naming decimal numbers in Grade 4?
Naming decimal numbers is covered in Saxon Math Intermediate 4, Chapter 4 (Lessons 31–40), connecting place value understanding to reading and writing decimal notation.