Numbers And Operations: Math Terms Explained

Plain-language definitions of every numbers and operations term your child meets in school, each with kid-friendly explanations, worked examples, and common mistakes to watch for.

Equal to

Equal to means that two numbers or quantities have the same value, even if they look different or are written in different ways.

Estimation

Estimation is using what you know to find a quick, reasonable answer that is close to the exact amount, length, or measurement without working it out perfectly.

Expanded form

Expanded form is a way of writing a number as a sum that shows the value of each digit, using its place value.

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