This is a review on using coins to make up multiplication and division number families. You've learned how multiplication problems with dimes, nickels, and quarters work. For this practice, let's use dimes.
Let's first solve a problem that tells how many coins you have:
Since you know that each dime is worth 10 cents, you know that 10 is the first lesser (smaller) number. You also know that the number of dimes is 6, so you know the other lesser number. The total number of cents is your greater (larger) number. To figure out how many cents you have, work the multiplication problem 10 times 6 (10 × 6). The answer equals 60 cents.
This last coin problem tells how many cents you have:
Write 10 for the first lesser number. Write 80, the total number of cents, as your greater number. To find the other lesser number, divide 80 by 10, which equals 8 (80 ÷ 10 = 8). Eight is the number of dimes you have.
