Capacity

Today we were learning about capacity  math strategy. The problem we had was Marama is planing a birthday party. She is inviting 11 friends 12 counting her. We need to find out how many 1.5 litre soft drink bottles will she need if they have one drink each. To do this we put water in one of the cups and then did it to the rest  to see how much  1.5 lire bottle can hold. We found out that the bottle can fill 8 and 1 third cups. One "trade purpose" cup is 180 milliliters.