1. 1 Hints: Look for relationships between the numbers of coins The value of each coin, and The total value of the coins. Coin Problems

2. Tony has 11 more nickels than quarters. How many coins does he have if the total value of his coins is $2.65? Type of CoinNumberValueTotal Value Nickels q + 115 cents5(q + 11) Quarters q25 cents25q Total Value Of Nickels += Total Value Of Quarters Total Value Of the Coins 5(q + 11) + 25q = 265 5q + 55 + 25q = 265 30q + 55 = 265 30q = 210 q = 7 Tony has 7 quarters and 18 nickels for a total of 25 coins.

3. Kelly received a play purse from her Grandfather that contained 25 coins worth $2.00. If the purse only contains nickels and dimes, how many of each coin are in the purse? Type of CoinNumberValueTotal Value Nickels n5 cents5n Dimes 25 – n10 cents10(25 – n) Total Value Of Nickels + Total Value Of Dimes = Total Value Of the Coins 5n + 10(25 – n) = 200 5n + 250 – 10n = 200 – 5n + 250 = 200 – 5n = – 50 n = 10 Kelly has 10 nickels and 15 dimes.

4. Josephine has $7.70 consisting of dimes and quarters. The number of quarters is two more than twice the number of dimes. How many of each kind does she have? Type of CoinNumberValueTotal Value Dimes Quarters Total Value Of Dimes + Total Value Of Quarters = Total Value Of the Coins

5. Jerry, the postal clerk, sold 80 stamps for $19.10. Some were 20 cent stamps and some were 30 cent air grams. How many of each kind did he sell? Type of StampNumberValueTotal Cost 20 cent 30 cent Total Value Of 20 cent + Total Value Of 30 cent = Total Cost Of the Stamps