7p to spend – combinations of coins
Digit Dog has bought a chocolate coin for 7p. He paid for it exactly, so which coins did he use?
How many different ways do you think he could do it? Convince me that you have found all the ways.
What is the least number of coins he could use? What is the most?
Which coins do you think he used? Which coins did he definitely not use? Why?
You might want to use your Numicon® purse to help you. Which coins are you going to use?
……..Digit Dog bought something for 8p, 9p, 10p………..any amount you like?
…….he didn’t have the exact money but only had a 10p coin. How much change would he have? Which coins might he be given?
………you used larger amounts?
Vary the amounts and the coins you can use.