Here we have a calculator game for two players. As well as the calculator you need the printed grid and some counters. Take turns to choose a number on the grid. Enter a number on the calculator that you think will produce the number in the square when multiplied by 9. if correct place a counter on the covering that number. Then it is your opponents turn. The aim is to get a line of four counters in a row, either across, down or diagonally.
These calculator activities can be found in year 5: Knowing Number Facts