Doubling and halving

Collect resources

You will need:

Items to create a mathematical model

• pens or pencils

• scissors

• plain paper, grid paper or dot paper.

Discuss/reflect

• Create a mathematical model to show how you could use doubling and halving to solve 6 x 8. You could use grid paper, dot paper, or even draw a comic strip!

• Find 3 examples where doubling and halving isn't an efficient strategy.

  • Why is it more efficient for some problems and not for others?