What’s the Difference?

Activities

• Have a target board (a collection of 2-digit numbers above 35) for the children to look at. Tell them you want them to subtract 19 from each of the numbers by counting on from the lower number.
• Ask the children to work in pairs. They choose four cards from a pack of 1–9 digit cards and explore making different subtractions of one 2-digit number from another. Agree not to consider negative answers.