Which number is greater, 89 or 12.577? How do you know? Choose the correct answer below.

A. 12.577 is greater. It has more digits than 89.
B. 89 is greater. The greatest place value for both numbers is the tens place. 89 has a greater digit in the tens place than 12.577.
C. 89 is greater. The greatest place value for both numbers is the ones place. 89 has a greater digit in the ones place than 12.577.
D. 12.577 is greater. It is not a whole number.

The number 89 is greater than 12.577 because it has a greater value in the tens place. The number of digits or whether the number is a decimal does not impact its value in comparison.

Explanation:

The correct answer to this question is: B. 89 is greater. The greatest place value for both numbers is the tens place. 89 has a greater digit in the tens place than 12.577. When comparing numbers, the amount of digits or whether a number is a decimal does not determine if the number is greater or less than another. The important factor is the value of the places within the number. For example, in the number 89, there are 8 tens and 9 ones, making it greater than 12.577, which has only 1 ten, 2 ones and then lesser values (less than 1) in its decimal places. The concept of significant figures, used in scientific measurements, does not apply to this comparison because we are not measuring anything; we're simply comparing the numerical values.

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