The following diagrams shows how the Part-part-whole Model and Comparison model can be used for addition and subtraction word problems. Scroll down the page for examples and solutions.
How to solve addition and subtraction two-step word problems?
These examples of addition and subtraction word problems and solutions will illustrate how to use the block diagrams (Singapore Math) method and tape diagrams (Common Core Math) to solve word problems.
Go to Math Word Problems for more examples.
How to use bar models to solve addition and subtraction word problems?
What is a Tape Diagram?
A tape diagram is a drawing that looks like a segment of tape, used to illustrate number relationships. It is also known as strip diagrams, bar model, fraction strip, or length model.
How to use tape diagrams in Part-whole Model and Additive Comparison Model problems?
How to model and solve an addition or subtraction word problem involving two changes?
Danny has 40 Star Fleet cards. He lost 17 cards at the park. He bought 13 cards at the store. How many cards did Danny have then?
How to model and solve a part-whole addition word problem involving two parts
Singapore Math - Addition and Subtraction with Two Parts
Part-Whole Model with two parts - Finding the whole.
Dylan paid $5 for a book. He had $19 left. How much money did Dylan have at first?
How to model and solve a part-whole addition word problem involving three parts?
Singapore Math - Addition and Subtraction with Three Parts
Sam is reading a book. He read 9 pages yesterday and 5 pages today. If he reads 12 more pages, he will finish the book. How many pages are in Sam’s book?
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