### Video Transcript

Sherif has the 20-pound note
shown. Sherif uses his 20-pound note to
buy a toy. The toy costs 10 pounds. What change does Sherif get?

This is a word problem. We know that Sherif has 20
pounds. And he uses his money to buy a toy
aeroplane. If the toy cost him 10 pounds, how
much change will he get? We could use a part–whole model to
help us solve the problem. We know that Sherif has 20 pounds
to begin with. And he bought a toy which cost him
10 pounds. How much money does he have
left?

One way that we could solve the
problem is to subtract 10 from 20. That will tell us how much money he
has left. Another way to solve the problem is
to think about which number we add to 10 to make 20. 10 and 10 are a pair which make
20. 20 take away 10 is 10. If Sherif has 20 pounds and he
spends 10 pounds on a toy, he will have 10 pounds left because 20 subtract 10 equals
10.