What is the whole-number part in (12.45)?
Answer and explanation
Correct answer: (12)
A decimal number has a whole-number part to the left of the decimal point and a fractional part to the right. In 12.45, the decimal point separates 12 from 45. Therefore 12 is the whole-number part, and 45 represents forty-five hundredths, or 0.45. Hence choice C is correct.
This can also be understood by place value. The digit 1 is in the tens place and 2 is in the ones place, so together they form the whole number 12. The digits 4 and 5 lie after the decimal point and form the fractional part. The number 1245 would ignore the decimal point, while 45 alone is only the digits after it. Thus the complete number is 12+0.45, and its whole-number part is 12.
Frequently asked questions
What is the correct answer to this question?
(12)
Why is this the correct answer?
A decimal number has a whole-number part to the left of the decimal point and a fractional part to the right. In 12.45, the decimal point separates 12 from 45. Therefore 12 is the whole-number part, and 45 represents forty-five hundredths, or 0.45. Hence choice C is correct.
This can also be understood by place value. The digit 1 is in the tens place and 2 is in the ones place, so together they form the whole number 12. The digits 4 and 5 lie after the decimal point and form the fractional part. The number 1245 would ignore the decimal point, while 45 alone is only the digits after it. Thus the complete number is 12+0.45, and its whole-number part is 12.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Decimal representation.
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