Here are some examples of additon and subtraction word problems. The videos will illustrate how to use the block diagrams (Singapore Math) method to solve word problems. Go to Math Word Problems for more examples.

Singapore Math - Part to Total Ratios

This video shows how to use Thinking Blocks to model and solve a part to whole ratio word problem

Singapore Math - Ratio Challenge Problem

This video shows how to use Thinking Blocks to model and solve a more challenging ratio word problem.

Singapore Math - Ratios Involving Three Quantities

This video shows how to use Thinking Blocks to model and solve a ratio word problem involving three quantities

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.