Google Classroom
GeoGebraGeoGebra Classroom

Three Numbers Arithmetic

Inspired by a Spears game called 'Trimatics' I had as a kid, that seems difficult to come by now. Use three numbers from the grid that are next to each other, in a row, column or an L or on a diagonal (sides or corners must meet). Use any of the four operators (add, subtract, multiply, divide) to compute to the number in the green above the board. Some examples of how '13' could be found on the example grid below. In the original game, if you found the number first you got to keep the number token. Game ended when the tokens ran out, the winner had the most tokens. The tokens here don't run out, but they'll repeat! Perhaps play first to 10 tokens? Click 'next' to generate numbers 1 - 50 in random order; click 'shuffle board' to start a new board. Create your own score keeping!
Image