why do you only need to look at the number of dollars to know that $5.12 is greater then $4.82

Because of Its Whole Number Like 5 Is greater than 4

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To determine which of the two amounts, $5.12 or $4.82, is greater, you only need to look at the number of dollars because the dollar value is the whole number part of the amount.

In this case, $5.12 has 5 dollars, while $4.82 has 4 dollars. Since 5 is greater than 4, we can conclude that $5.12 is greater than $4.82.

To make this comparison, you can ignore the cents or any decimal numbers because when comparing whole numbers, the decimal part does not play a role in determining the greater value.