The hedgehog has to collect the number in the top of the screen. To choose Add or Substract, hit the balloons containing the + and -.
By hitting a balloon containing a number, you will add or substract that number with the result.
You need to count quickly, because if you are taking too long, your chance will be over and you will get a new number.
Ready for classrooms with a SMARTboard or Interactive Whiteboard
Educational maths lessons for primary school (Key stage 1 and 2) online homeschool curriculum