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Math Expressions: Counting, Meaning, and Evidence

Use number-related language to evaluate facts, point out inconsistencies, and describe what affects an outcome.

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Words and Their Stories · 7:51

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Source: VOA Learning English · Words and Their Stories

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This episode connects several math words to everyday reasoning. “Do the math” asks someone to examine the facts, “doesn’t add up” signals that details seem inconsistent, and “part of the equation” identifies one factor affecting a result. The guide avoids the article’s dated election example and does not frame suspicion as proof.

Cultural note: “Do the math” can sound impatient or sarcastic if the conclusion is not obvious to everyone. “That doesn’t add up” expresses doubt, but it does not prove dishonesty; ask for missing details before accusing anyone.

Keep exploringNumber words can help you describe evidence—but an expression of doubt is still not evidence by itself.

Phrase guide · 4 expressions

Explore the expressions

Original explanations and examples, created for learners. Save a card for later or hear the phrase spoken by your browser.

Working from the facts

Use language for reaching a conclusion or noticing a mismatch.

do the math

Meaning

Examine the facts or figures to reach a conclusion.

Tone & use

Informal and sometimes pointed: it can imply that the answer should be obvious. Use “let’s work it out” when you want a collaborative tone.

Example

“The repair costs $300, and the warranty covers $250, so let’s do the math before deciding.”

NeutralInformal

doesn’t add up

Meaning

Seems inconsistent or does not make sense when details are considered together.

Tone & use

Common for facts, explanations, or numbers. It signals a concern, not proof that someone lied.

Example

“The receipt lists two lunches, but only one person attended; the total doesn’t add up.”

NegativeInformal / idiomatic

What affects an outcome

Name one element that matters within a larger situation.

part of the equation

Meaning

One element that must be considered as part of a larger situation.

Tone & use

Useful in planning and analysis. It highlights a factor but does not say that factor is the only one that matters.

Example

“Travel time is part of the equation when we decide whether the evening class is practical.”

NeutralNeutral / figurative

Different meanings of “count”

Distinguish calculating a total from having importance.

count

Meaning

Matter or have importance, rather than simply be included in a numerical total.

Tone & use

The meaning depends on context: votes can be counted, while a person’s contribution can count by being important. “My opinion counts” means it matters.

Example

“A small donation still counts because it helps cover the community room’s heating bill.”

PositiveNeutral

Knowledge check

Try it

Choose the expression that best fits each situation.

Try it · Choose the best expression

1 of 3

A proposal promises $50 in savings but adds a $70 fee. What can you suggest doing before agreeing?