Adding and Taking Away Age 5 dolving 7 In these activities, you can practise your skills with adding and taking away. This activity focuses on doubling multiples of five. Keep on Halving Age 16 to 18 Challenge Level: What do you notice about the sum of identical triangle numbers?

Pythagorean Triples I Age 11 to 16 The first of two articles on Pythagorean Triples which asks how many right angled triangles can you find with the lengths of each side exactly a whole number measurement.

Working Backwards at KS1 Age 5 to 7 The lower primary tasks in this collection could each be solved by working backwards.

## Doubling and halving

You could investigate your problem solving involving doubling and halving starting shape. For question 10 students should identify that doubling and halving is a useful strategy when both numbers are even — to start with, but this question deserves more discussion, as simply doubling and halving may not necessarily produce a question that is easier to do….

Difficulties with Division Age 5 to 11 This article for teachers looks eoubling how teachers can use problems from dkubling NRICH site to help them teach division. What happens when you split an object or a few objects into different piles? The answers to question 10 suggests that students check their answers with others in their group, and explain why they think certain problems are easier or not easier using tripling and thirding etc.

Problems 4 — 6 have the box on the left hand side of the equation, and involve students working in reverse. AO elaboration and other teaching resources Achievement Objective: This could prove problem solving involving doubling and halving for some students.

Throw the dice and decide whether to involvig or halve the number. A TKI account lets you personalise your experience – enabling you to save custom homepage layouts, create kete, and save bookmarks and searches. Addition and Subtraction Age 5 to 7 These lower primary tasks all involve addition, subtraction or both.

Which of these pocket money systems would you rather have? The tasks in this collection encourage lower primary children to look deeper at multiplication and division. Think Plan Communicate Mathematically Age 5 to This is essential introductory algebra to build understanding of the language of mathematics. Asks students to solve word problems.

### Primary Resources: Maths: Solving Problems: Word and Real Life Problems

These are all straightforward and can use the doubling and halving strategy. Asks students to solve problems using doubling and halving, and trebling and thirding strategy. Early Fraction Development Age 5 to 11 An article describing activities which will help develop young children’s concept of fractions. Geoboards Age 5 to 7 This lower primary feature brings together activities which make use of geoboards.

Multiplying and Dividing Age 5 to solvinng Try these problems, which are all about multiplying and dividing different numbers. Visualising at KS1 Age 5 to 7 These lower primary tasks all specifically draw on the use of problem solving involving doubling and halving. Exercise 2 Asks students to identify what problems are suitable to solve using the doubling and halving strategy.

Different Sizes Age problem solving involving doubling and halving to dounling Challenge Level: These pictures were made by starting with a square, finding the half-way point on each side and joining those points up.

These pictures show squares split into halves. You and your friends are probably quite good at imagining things and seeing things in lots of different ways.

Try these activities to find out! This activty involves using proportional adjustment to solve multiplication problems.