A song about patterns in addition and subtraction accompanies a go-kart race. It shows how you can use multiples of 10 to work out the answers to the questions 50 - 20 and also, 5 – 2.

Addition of tens and ones A demonstration of addition by grouping pennies into tens and ones. Two cartoon characters are counting pennies from a piggy bank. They have a pile of ten pennies and are ...