Numbers

BBC Teach > Skillswise > Maths

Become more confident with numbers by learning about place value, rounding and estimating plus other useful skills.

Number lines

Number lines

Number lines are a useful way to visualise addition and subtraction.

Number symbols

Number symbols

Numbers have many uses, for example prices and phone numbers.

Place value

Place value

Place value is useful for understanding double digit numbers or greater.

Decimals

Decimals

Decimals are used to show numbers that are between two whole numbers. For example, 2.5 and 3.87.

Negative numbers

Negative numbers

A negative number is a number smaller than zero. They are mostly used to show temperatures below freezing.

Rounding and estimating

Rounding and estimating

Rounding and estimating are useful if you want to quickly do a complicated calculation in your head.

Formulas

Formulas

Formulas help you find an unknown value in a problem,