Digit Dog and Calculating Cat are playing a game of Bone Splat!
A “splat” and some bones (download here).
First decide on the total number of bones – in this game they are exploring pairs of numbers that total 10. Count out that number of bones and put a digit card in the empty box on the “splat”.
Player One: close your eyes.
Player Two: hide some of the bones under the “splat”.
Player One: open your eyes and work out how many bones have been hidden under the splat.
Explain how you worked it out. Convince your partner that you are right.
Encourage learners to explain how they worked out the number of bones that are hidden. They might:
- Use a 10 frame and objects (or visualise them like Calculating Cat);
- Use a Numicon shape and toy bones or pegs;
- Use a number line to count on;
- Draw a picture;
- Just know the number bond.
Record some number sentences to show how many different ways the bones can be hidden. For Digit Dog’s problem we could write: 6 + 4 = 10, 4 + 6 = 10, 10 – 4 = 6, 10 – 6 = 4.