Respuesta :
Answer: The number before the decimal
Step-by-step explanation:
The digit in the ones place is 9, in the given number 409.21.
What is the place value?
- There are only 10 digits in the number system. They are 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
- The digits in a number have values depending on their place. Those values are called place values.
- According to the number system, the place values are ones, tens, hundreds, thousands, and so on.
- For a decimal number, after the decimal point, the place values are tenths, hundredths, thousands, and so on.
- A number is obtained by adding the product of digits with their place values.
Expanding the given number according to place values:
The given number is 409.21
⇒ 400 + 00 + 9 + 2×(1/10) + 1×(1/100)
⇒ 4×100 + 0×10 + 9×1 + 2×(1/10) + 1×(1/100)
So, the digit in ones place is 9.
Learn more about the place value system here:
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