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Listed under:  Mathematics  >  Number (Mathematics)  >  Proportions  >  Decimals
Teacher resource

TIMES Module 28: Number and Algebra: the real numbers - teacher guide

This is a 31-page guide for teachers. It brings together many ideas concerning real numbers. Integers, rational numbers and irrational numbers are discussed.

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Calculating percentage and simple interest: Banking

Most of us use banks to keep our money safe. We put our money in, can access it at any time and earn interest. So how do the banks make such enormous profits? Where does that money come from? Listen to Nathan Bazley explain how the banks use your money and make a profit. This clip provides a context for percentage, simple ...

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Decimal multiplication: petrol prices

Petrol for our cars is made from crude oil. The price of crude oil is constantly changing. This affects the price of petrol at the pump. Listen to Natasha Thiele explain how and why the price of petrol keeps changing. This clip provides context for decimal multiplication.

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Small scale measurements

What units of measurements do we use to describe incredibly small things like blood cells and atoms? Watch as you are taken on a journey to explain the different units of measurement that we use to describe the very small.

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Are plants mathematicians?

Ever noticed that plants are examples of Fibonacci numbers? Watch Vi Hart draw examples of flower petals and leaf growth that follow this pattern. See how plants seem to use Phi (.), the golden ratio. Find out how to make your own 'angle-a-tron' to create interesting petal designs. This is the second in a series of two.

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Multiplying and dividing decimals

Learn how to multiply and divide decimals by 100. Based on this video, see if you can work out how to multiply and divide decimals by 10 and 1000. What do you get if you multiply 0.375 by 10?

Teacher resource

Mental computation: fractions and decimals

This is a teacher resource that is part of a wider series; it provides a structured strategies-based approach to mental computation of problems involving common and decimal fractions for primary level. It provides nine classroom activities that enable students to develop mental-computation skills in sequence by building ...

Interactive resource

Swamp survival: hundredths counting

Help the boy cross the dangerous swamp by making a path of stepping stones. Place the decimals in an ascending order, counting by either tenths or hundredths to form the path. Compare the decimal fraction on each stepping stone to the others to see if it is larger or smaller. Look for a counting pattern. Put the decimals ...

Interactive resource

Swamp survival: hundredths patterns

Help the boy cross the dangerous swamp by making a path of stepping stones. Place the decimals in an ascending order, skip-counting by tenths or hundredths to form the path. Compare the decimal fraction on each stepping stone to the others to see if it is larger or smaller. Look for a skip-counting pattern. Put the decimals ...

Interactive resource

Swamp survival: hundredths challenge

Help the boy cross the dangerous swamp by making a path of stepping stones. Place the decimals in an ascending order to form the path. Compare the decimal fraction on each stepping stone to the others to see if it is larger or smaller. Look carefully at whole numbers and the tenths or hundredths. Put the decimals in order ...

Interactive resource

Swamp survival: thousandths counting

Help the boy cross the dangerous swamp by making a path of stepping stones. Place the decimals in an ascending order, counting by thousandths to form the path. Compare the decimal fraction on each stepping-stone to the others to see if it is larger or smaller. Look for a counting pattern. Put the decimals in order from ...

Interactive resource

Swamp survival: thousandths patterns

Help the boy cross the dangerous swamp by making a path of stepping stones. Place the decimals in an ascending order, skip-counting by hundredths and thousandths to form the path. Compare the decimal fraction on each stepping stone to the others to see if it is larger or smaller. Look for a skip-counting pattern. Put the ...

Interactive resource

Swamp survival: thousandths challenge

Help the boy cross the dangerous swamp by making a path of stepping stones. Place the decimals in an ascending order to form the path. Compare the decimal fraction on each stepping stone to the others to see if it is larger or smaller. Look carefully at whole numbers and the tenths, hundredths or thousandths. Put the decimals ...

Interactive resource

The Metrix: new planet

Captain the Metrix spacecraft on its mission to a new planet. Use the metric measurement tables for length, volume and area to help you make decisions about the spacecraft’s launch, flight and landing. For example, to select and load the correct ship’s cargo, convert three cubic metres into cubic centimetres. Reach the ...

Interactive resource

The Metrix: new planet: decimals

Captain the Metrix spacecraft on its mission to a new planet. Use the metric measurement tables for length, area and volume, plus your knowledge of decimal numbers, to help you make decisions about the spacecraft's launch, flight and landing. (For example, convert 350 cm2 to m2 to select a solar panel to replace the one ...

Interactive resource

Wishball: tournament

Challenge your understanding of place value in whole numbers and decimal fractions, from 0.001 to 9999. Either add or subtract numbers to reach a target number. For example, receive a starting number of 39.61. Spin the number 5 and decide whether to add or subtract 0.05, 0.5, 5 or 50 to reach your target number of 70.12 ...

Assessment resource

Scale matters: all numbers: assessment

Test your understanding of the use of scales, ranging from tens of thousands or thousands through to ones, tenths or hundredths. Look at two numbers and place a third number on a number line. Rename the third number by assigning place values for each digit or group of digits. For example, look at the numbers 105 384 and ...

Assessment resource

Scale matters: decimal numbers: assessment

Test what you know about using scales ranging from hundreds and tens down to tenths and hundredths. Look at two numbers and place a third number on a number line. Rename the third number by assigning place values for each digit or group of digits. For example, look at the numbers 74.6 and 76 on a number line and select ...

Interactive resource

Wishball: tenths

Test your understanding of decimal place value with numbers that include tenths. Receive a starting number, such as 128.9, and work towards turning it into a target number, such as 845.6. Spin a random digit, choose its decimal place value and decide whether to add or subtract the random digit from your starting number. ...

Tablet friendly (Interactive resource)

Wishball: hundredths

Test your understanding of decimal place value with numbers that include hundredths. Receive a starting number, such as 46.87, and work towards turning it into a target number, such as 85.32. Spin a random digit, choose its decimal place value and decide whether to add or subtract the random digit from your starting number. ...