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# Mathematics / Year 1 / Number and Algebra / Number and place value

Curriculum content descriptions

Represent and solve simple addition and subtraction problems using a range of strategies including counting on, partitioning and rearranging parts (ACMNA015)

Elaborations
• developing a range of mental strategies for addition and subtraction problems
General capabilities
• Numeracy Numeracy
• Critical and creative thinking Critical and creative thinking
ScOT terms

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Year level F-2
Resource type
Learning area Mathematics

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### Sites2See – number for primary

Selected links to a range of interactive online resources for the study of number in Foundation to Year 6 Mathematics.

### Pirate treasure hunt: eight challenges

Join forces with Pirate Jack. He needs your help to solve eight problems and find the hidden treasure. Use the map to work your way through the obstacles one by one and in the right order. Apply your maths and literacy skills to make sure you collect the correct item before tackling the next obstacle. For example, you’ll ...

### Counting beetles: solving word problems

Look at a word problem that uses beetles. Use the number line to show how to solve the problem. Watch an animation of the problem on a number line. Make a number sentence to match the number line. This learning object is one in a series of five objects. Three objects in the series are also packaged as a combined learning object.

### Counting beetles: making word problems

Make a word problem using beetles. First, decide whether to add or subtract. Select the number of beetles for your problem. Use the number line to show how to solve the problem. Watch an animation of the problem on a number line. Make a number sentence to match the number line. This learning object is one in a series of ...

### Balance the cups: use the rule 1

Put blocks into the cups on the scales to make them balance, using the number rule A = B + C. Use your knowledge of addition to help you work out how many blocks you need in each cup. Finish the number sentence to show an equal number of blocks on each side. This learning object is the first in a series of three learning objects.

### Gobbling Goblins

Welcome to 'The Toadstool Bistro', the hottest diner in Goblin Town. Maître d' Grundle is in a panic! The Gobbling Goblins, three fierce food critics, have arrived at The Toadstool Bistro and they're determined to put your kitchen to the test! Your goal is to keep the food coming for these ghastly gourmets. Use your maths ...

### Mental computation: basic facts - addition and subtraction

This is a teacher resource that is part of a wider series; it develops a structured strategies-based approach to mental computation of the 242 basic mathematics facts at primary level. The resource provides 13 stimulating classroom activities that encourage students to use a wide variety of mental-computation strategies. ...

This sequence of two lessons explores early algebraic thinking around the concept of equivalence. Students develop equivalence understanding by partitioning numbers into two parts. They explore the commutative property and compensation as they are challenged to find all possible combinations. Each lesson is outlined in ...

Flynn and Dodly go camping. While on their camping adventure they investigate adding numbers from one to ten. Watch how they work out how many of each item they have altogether. The Flying Girl and Ben the Bilby also appear.

How many different ways can you think of to add two numbers to reach ten? Watch this video to learn them all!

### Counting pirate treasure

Watch as a stingy pirate captain counts out wages in 'pieces of eight' (gold coins) for one of his crew. Watch as the pirate captain takes away pieces of eight for what he calls 'deductions'. See how much gold the crew member walks away with!

### Let us count how many

This is a web resource that includes four student activities focusing on numbers to 20, accompanied by a teacher guide for each activity. It covers counting, including counting in Asia; number representation; number names; one-to-one correspondence of collections; and simple addition and subtraction using concrete materials. ...

### Maths Years F-1 with Miss James: Addition using a number line

In this lesson, Miss James teaches you the valuable “counting on” strategy to help you solve tricky addition problems. She demonstrates how to use a number line correctly, and she provides opportunities for you to have a go at home.

### Maths Years F-1 with Miss James: Worded problems with addition and subtraction

In this lesson, Miss James needs your detective skills to solve some addition and subtraction problems. Look for clue words that will help you to decide if you should add or subtract, then try to challenge one of your family members at home!

### Maths Years F-1 with Miss James: Subtraction using a number line

In this lesson, Miss James teaches you the valuable “counting back” strategy to help you solve tricky subtraction problems. She demonstrates how to use a number line correctly, and she provides opportunities for you to have a go at home.

### Maths Years F-1 with Miss James: Subtraction using concrete and pictorial strategies

In this lesson, Miss James teaches you how to solve subtraction problems using counters and pictures. She demonstrates how to set up and solve the subtraction questions correctly, and she provides opportunities for you to have a go at home.

### Elmo's ducks

Sing along with Elmo and his four quacking ducks. One by one the ducks go away. How many ducks are left? See if Elmo's ducks come back.

### Counting beetles

Choose to do the activities in levels one, two or three. Watch the beetles crawl into the garden or out of the garden. Watch some beetles completely or partially hide beneath the leaves. Work out how many beetles there are altogether. Remember to count any beetles hiding under the rock. Choose a number for your answer and ...

### Counting beetles: level 3

Watch the beetles crawl into the garden or out of the garden. Watch some beetles completely or partially hide beneath the leaves. Work out how many beetles there are altogether. Remember to count any beetles hiding under the rock. Choose a number for your answer and check it. This learning object is one in a series of five ...

### Using 'Counting on, counting back' - Teacher idea

This Teacher idea uses a combination of games (both digital and non-digital) and hands-on tasks to explore sequencing whole numbers to 20, and solve addition and subtraction problems using 'counting on' and 'counting back' strategies. It includes reflections following the teaching of R11450 'Counting on, counting back - ...

This collection contains 12 digital curriculum resources from the 'Counting beetles' and 'Number trains' series. The collection includes two categories of counting strategies: counting on and back, to give students practice in counting on or back from any number up to 120; and counting using number representations. A third ...

These seven learning activities, which focus on 'open-ended tasks' using a variety of tools (software) and devices (hardware), illustrate the ways in which content, pedagogy and technology can be successfully and effectively integrated in order to promote learning. In the activities, teachers use investigations in order ...

### TIMES Module 2: Number and Algebra: addition and subtraction - teacher guide

This is a 29-page guide for teachers. The module introduces addition and subtraction of whole numbers.

### Number line, by the Math Learning Centre - iTunes app

Use a virtual number line to visualise number sequences and to represent and solve addition, subtraction, multiplication and division problems. Free when reviewed on 12/5/2015.

### Number rack, by the Math Learning Centre - iTunes app

Addition and subtraction using an interactive bread frame. Encourages the use of different strategies to solve addition and subtraction problems. Drawing tools enables students to annotate work to show their understanding. Write equations with the text tool. Free when reviewed on 12/5/2015.

### Number frames, by the Math Learning Centre - iTunes app

Addition and subtraction using an interactive bread frame. Encourages the use of different strategies to solve addition and subtraction problems. Drawing tools enables students to annotate work to show their understanding. Write equations with the text tool. Free when reviewed on 12/5/2015.

### Mental computation: introduction

This is a teacher resource that is part of a wider series; it introduces a structured strategies-based approach to mental computation for primary level and provides four generic classroom activities that can be used to empower students to use, share and test strategies. The support material describes the content of the ...