Name decimals
Naming decimals correctly requires reading the whole number part, saying ‘and’ for the decimal point, reading the decimal digits as a whole number, and then naming the last digit’s place value, as taught in Grade 4 Pengi Math. For example, 3.47 is read as “three and forty-seven hundredths.” The suffix ‘-ths’ signals a fractional value (tenths, hundredths). This standard reading convention prevents confusion between whole numbers and decimals and is required for correctly interpreting and writing decimal values in word form.
Key Concepts
Property To name a decimal number: 1. Name the number to the left of the decimal point (the whole number). 2. Write 'and' for the decimal point. 3. Name the number to the right of the decimal point as if it were a whole number. 4. Name the decimal place of the last digit. The 'th' at the end of the name means the number is a fraction.
Examples The number 0.4 is read as 'four tenths' because the 4 is in the tenths place. The number 0.62 is read as 'sixty two hundredths' because the 2 is in the hundredths place. The number 0.05 is read as 'five hundredths' because the 5 is in the hundredths place. The number 0.7 is read as 'seven tenths' because the 7 is in the tenths place.
Explanation Naming decimals is like telling a number's full story. The part before 'and' is the whole number, and the part after is the fraction. The last word, like 'hundredths', tells you the size of the fractional pieces.
Common Questions
How do you say a decimal number in words?
Name the whole number, say ‘and’ for the decimal point, read the decimal digits as a whole number, then name the place of the last digit. Example: 2.05 = ‘two and five hundredths.’
What does ‘and’ represent when reading decimals?
‘And’ always represents the decimal point. It is the verbal signal that the next digits are fractional, not whole. Never say ‘and’ in the middle of a whole number.
What is the difference between ‘tens’ and ‘tenths’?
‘Tens’ is a whole number place value (10, 20, 30). ‘Tenths’ is a decimal fraction (0.1, 0.2). The ‘-ths’ suffix always signals a fractional value less than one.
How do you name 0.4 in word form?
0.4 is read as ‘four tenths’. There is no whole number, so you only name the decimal part. The 4 is in the tenths place.
How do you name 12.305 in word form?
‘Twelve and three hundred five thousandths.’ The last decimal digit (5) is in the thousandths place, which names the entire decimal portion.