Question

These are the first sentences in the short story, "The Gift of the Magi," by O. Henry:

"One dollar and eighty-seven cents. That was all. And sixty cents of it was in pennies."

What are possible numbers of coins to make $1.87?

Use the equation that represents the value of the coins to complete the table.
what the formula or how do i solve this

Answer 1

In each row the value of the coins should be $1.87

So for the first row there are 4 quarters, 6 dimes, 5 nickels. Quarters are 25 cents, dimes are 10 cents, nickels are 5 cents. So we have (0.25)(4) + (0.10)(6) + 5(0.05) = 1.85

There are only two cents left (0.02) to get $1.87 so you would need 2 pennies, so you’d write 2 in the penny column.

Repeat this logic for the other rows.

Answer 2

Quarters are 25 cents or (0.25) of a dollar. So to calculate the value of 4 quarters, you multiply (0.25)(4). Repeat this logic for the other coin values.

In general, (value per coin)(number of coins) = the total value of those coins