Learning Intention: To explore subtraction using the ‘whole-part-part’ strategy.
Option 1: Subtraction Smash
Fill the strip with balls of play dough in each box. Roll a die. (If you do not have dice at home, use this link instead.) Students smash the number of play dough balls shown on the die. Record how many play dough balls are left.
Option 2: Subtraction Mat
To begin, place the worksheet in a plastic pocket or sheet protector, or draw a similar robot on your whiteboard. Students will start by rolling two dice. (If you do not have dice at home, use this link instead.) They will make the larger number in the green box with materials (such as LEGO, buttons or pasta) to represent the ‘whole’. Then they will slide the part they are taking away (the smaller number) into the yellow box. Finally they will solve the subtraction problem by pushing whatever is left to the red box. That will be the answer to the problem.
Option 3: Subtraction Game