Subtraction Circles- NRICH

Pick your number. Come up with as many different examples to make this number.{...}

Launch: https://www.sciencebuddies.org/stem-activities/aluminum-foil-boats-float Explore: Make a boat out of foil. Your challenge is to hold the most amount of unifix. What{...}

Can your teacher throw a bean bag into a hoop? Repeat ten times In partners record this information? What ways{...}