Final answer:
The equation 5x9=45 can be expressed as the comparison sentence 'Five times nine is equal to forty-five.' It is a simple multiplication fact where 5 groups of 9 items make 45 items. When comparing measurements, ensure both are in the same unit for an accurate comparison.
Step-by-step explanation:
The equation 5x9=45 can be represented in a comparison sentence as: "Five times nine is equal to forty-five." To understand this comparison better, let's consider each element of the sentence. When we multiply 5 by 9, we get the product of 45, which means five groups of nine items give a total of 45 items.
In terms of other comparisons, if we're looking at measurements and trying to convert them, we need both measurements in the same unit. For example, if we're comparing 45 centimeters to 500 millimeters, we first need to know that there are 10 millimeters in a centimeter, so 500 millimeters is equal to 50 centimeters (500/10=50). Once we have both measurements in centimeters, we can say that 45 centimeters is less than 50 centimeters, which means 45 cm is less than 500 mm.