Bar models

Front

If you have two parts, and you need to find the whole...do you add or subtract? Options: addition, subtraction

Back

addition

Front

If you have the whole and a part, and you need to find the other part...do you add or subtract?

Back

subtraction

Front

The boys in Mr. Browne's class have 79 pieces of candy. The girls have 43 pieces of candy. How many more pieces of candy do the boys have? What type of bar model will help you answer the question? 

Back

A subtraction bar model.