Answer: Divide
Step-by-step explanation: (Don't look at this if you are taking a test) :)
Hello! What you do to answer this question is divide 5100 grams by 2.5 grams. You would do this because you want to divide the weight of all the pennies by the weight of a single penny to find the number of pennies. This is because number of pennies multiplied by 2.5 grams (weight of a penny) = 5100 grams (weight of all pennies). You will be able to figure out what the answer is by dividing 5100 by 2.5.
I will give you an example problem if you need help dividing decimals:
3000/1.5
Move the decimal space over one to get 3000/15
15 √3000
30 divided by 15 is 2
2
15√3000
15 x 2 = 30
200
15 √3000
- 30 bring down two zeroes
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000
Since there are two extra zeroes that you took, down your answer is 200. Since you already moved the decimal space one space to the right, move it to the right again and you will get 2000. Your answer for the example problem is 2000.