Key learning points

1. Word problems can be represented in a bar model by identifying the parts and the whole.
2. To find the whole, we need to add the parts together.
3. To find a part, we need to subtract the part we know from the whole.
4. If the units are different, they need to be converted to the same unit.

Keywords

• Bar model - A pictorial representation of a problem where bars are used to represent the known and unknown quantities.

• Part - Some but not all of something. It is an amount or section which, when combined with others, makes up the whole.

• Whole - All of something. It is complete.

Common misconception