The Universal Calculation Engine
The Universal Calculation Engine

Is your mental total close at checkout

Part of: Estimation

Turn a word problem about estimation into symbols: names and units before formulas.

From words to math

Working through estimation, read the last sentence first so you know what the question asks for. Then label each number with what it measures. Estimation connects the math to the full lesson.

Match words to operations

For estimation, words like “per,” “each,” “total,” and “leftover” point toward multiply, divide, add, or subtract. Match the word to an operation, then write the expression.

Label everything

Underline the quantity you need to find. Circle every given number with its unit (miles, dollars, cups). Convert units before you add or subtract.

After you translate

Core lesson

Related: Estimation. Use the calculator with your own numbers when the example is not close to your case.

Use the calculator

FAQ

Where is the main lesson?

Estimation has the full topic, examples, and practice links.

Which calculator first?

After your setup is on paper, open Rounding for a quick numeric pass.