Addition is the process of finding the total or sum by combining two or more numbers.

200

Solving vertically means writing numbers one on top of the other, aligning them by place value, to make addition or subtraction easier.

A place value chart is a tool that helps organize numbers by their place values, such as ones, tens, hundreds.

Bundling is grouping numbers into tens or hundreds to make addition easier.

233

132

208

Jessica added incorrectly; she should have added 109 and 99 to get 208.

A number line is a straight line with numbers placed at equal intervals, used to represent numbers visually.