John buys one toy car and one pack of stickers. He pays with a 10-pound note. How much change does John get?
We know the car costs one pound 49 and a pack of stickers costs one pound 64. So the first step in solving this problem is to work out how much John has spent. We need to add together the cost of the toy car and the pack of stickers. Nine and four is 13. Four and six is 10, plus the one we exchanged makes 11. One plus one is two, and the one we exchanged makes three. So John has spent three pounds 13.
We know he paid with a 10-pound note. We just need to work out how much change he should get. We need to take three pounds 13 away from 10 pounds. To do this, we can find the difference between 3.13 and 10. We can start at 3.13 and add forward until we reach 10. We could start by adding seven pence. This takes us to three pounds 20. Next, we can add 80 pence to three pounds 20, which will take us to four pounds. And finally, we can add six pounds to the four pounds, which takes us to 10. Six plus 80 is six pound 80, plus the seven is six pounds 87. So the answer to the question is six pounds 87.
This is a two-step problem. First, we added the amount of the toy car and the amount of the pack of stickers, which gave us the total amount spent of three pounds 13. Then we found the difference between 10 pounds and three pounds 13 to tell us how much change John should get. 10 pounds take away the three pounds 13 he spent equals six pounds 87.