AO elaboration and other teaching resources Achievement Objective: The number of plants in Mr McGregor’s magic potting shed increases overnight. Adding and Taking Away Age 5 to 7 In these activities, you can practise your skills with adding and taking away. What do you notice about the sum of identical triangle numbers? The activity asks students to solve problems, fill in missing numbers in equations using proportional adjustment and solve word problems.

Which of these pocket money systems would you rather have? As students should already be at stage 6 before they attempt such an exercise, this should not cause problems for students, though work with large numbers should be forming part of the teaching. Age 5 to 7 Challenge Level: Asks students to solve problems using doubling and halving, and trebling and thirding strategy. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. 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.

In these activities, you can practise your skills with adding and taking away.

# Doubling and halving | nzmaths

Generalise properties of multiplication and division with whole numbers. This could prove tricky for some students.

Te Kete Ipurangi Navigation: If not, you should register with the link below. Fractions Age 5 to 7 Try these lower primary tasks if you want to improve your understanding of fractions. Think Plan Communicate Mathematically Age 5 to Baskets Age 3 to 5 Counting reliably Solving problems, including doubling, halving and sharing. These are all straightforward and can use the doubling and halving strategy.

## Doubling and halving

AO elaboration and other teaching resources. Addition and Subtraction Age 5 to 7 These lower primary tasks all involve addition, subtraction or both.

Follow Up Age 14 to 16 Challenge Level: Multiplication and Division KS1 Age 5 to 7 The tasks in this collection encourage lower primary children to zolving deeper at multiplication and division. Fractions Age 7 to 11 Explore the idea of fractions using these activities. What happens when you split an object or a few objects into different piles?

Multiplying and Dividing Age 5 to 7 Try these problems, which are all about solvinng and dividing different numbers. Cut and Paste Doubling and halving bingo 23KB.

These pictures show squares split into halves. Halving the Triangle Age 16 to 18 Challenge Level: Good discussion is warranted as a follow-up.

## Word problems with doubling and halving

Age 5 to 7 Challenge Level: Paper Halving Age 5 to 11 Challenge Level: Adding and Taking Away Age 5 to 7 Silving these activities, you can practise your skills with adding and taking away. 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.

How can he do it? AO elaboration and other teaching resources Achievement Objective: To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. Doubling and halving Keywords: The number of plants in Mr McGregor’s magic potting shed increases overnight.

Investigate the different ways you could split up these rooms so that you have double the number.

# Primary Resources: Maths: Calculations: Doubling & Halving

You can also solve problems about what happens when we add or take away different numbers! Room Doubling Haling 7 to 11 Challenge Level: The final question have 2 unknowns — and the instruction identifies that they involve doubling and halving.

They may need to be taught what a mind map is and what it looks like. Students who do not read this instruction could find they cannot do them, unless they assume that they have been doubled and halved. Asks students to solve problems using doubling and halving, and trebling and thirding strategy. Different Sizes Age 5 to 11 Challenge Level: