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

 

• use the terms 'add', 'plus', 'equals', 'is equal to', 'take away', 'minus' and the 'difference between'

• use concrete materials to model addition and subtraction problems involving one- and two-digit numbers

• use concrete materials and a number line to model and determine the difference between two numbers, eg

 

 

• recognise and use the symbols for plus (+), minus (–) and equals (=)

• record number sentences in a variety of ways using drawings, words, numerals and mathematical symbols

 

• recognise, recall and record combinations of two numbers that add to 10

 

Cool Math Lines 10

 

Make 10

 

Ways to Make 10

 

Add to 10

 

Hit the Button (Make 10 – digits)

 

Number Twins 10

 

What Makes 10

 

Match 10

 

Mathsframe Number Bonds

 

 

• create, record and recognise combinations of two numbers that add to numbers up to and including 9

    * model and record patterns for individual numbers by making all possible whole-number combinations, eg

5+0=5    4=1=5    3=2=5    1=4=5    0+5=5   (Communicating, Problem Solving)

 

 

Woodlands Number Bonds to 10

 

Ways to Make

 

Save the Whale

– Bonds to 10

 

Mathsframe Number Bonds

 

 

    * describe combinations for numbers using words such as 'more', 'less' and 'double', eg describe 5 as 'one more than four', 'three combined with two', 'double two and one more' and 'one less than six' (Communicating, Problem Solving)

• create, record and recognise combinations of two numbers that add to numbers from 11 up to and including 20

    * use combinations for numbers up to 10 to assist with combinations for numbers beyond 10 (Problem Solving)

 

Ogre Addition

 

Maths Lines – Add to 20

(can also choose number 5-13)

 

Mathsframe Number Bonds

 

Funky Mummy Game

(click Next to stop dancing)

 

Owl Addition (Level 3)

 

Oswego Addition Game

 

Post Sorting – total less than 20

 

Building Expressions – 0-20

 

Alien Addition

 

Math Magician – Addition Level 2

 

Repair the Slide – Add to 20

 

 

• investigate and generalise the effect of adding zero to a number, eg 'Adding zero to a number does not change the number'

 

Talking Calculator

 

• use concrete materials to model the commutative property for addition and apply it to aid the recall of addition facts, eg 4 + 5 = 5 + 4

 

 

Learn to Add

(must work through games –

first 2 games add to 10,  3^rd game add to 20)

 

Owl Addition

 

Addition Animations

 

Ways to Make a Number

 

Ogre Addition

 

• relate addition and subtraction facts for numbers to at least 20, eg 5 + 3 = 8, so 8 – 3 = 5 and 8 – 5 = 3

 

IXL Related Number Facts

 

Add Single Digits to Make Target

 

Owl Addition (Level 3)

 

Post Sorting – total less than 20

 

Building Expressions – 0-20

 

 

• use and record a range of mental strategies to solve addition and subtraction problems involving one- and two-digit numbers, including:

− counting on from the larger number to find the total of two numbers

− counting back from a number to find the number remaining

− counting on or back to find the difference between two numbers

− using doubles and near doubles, eg 5 + 7: double 5 and add 2

− combining numbers that add to 10, eg 4 + 7 + 8 + 6 + 3: first combine 4 and 6, and

7 and 3, then add 8

− bridging to 10, eg 17 + 5: 17 and 3 is 20, then add 2 more

− using place value to partition numbers, eg 25 + 8: 25 is 20 + 5, so 25 + 8 is 20 + 5 + 8, which is 20 + 13

  *  choose and apply efficient strategies for addition and subtraction (Problem Solving)

 

Counting On in 1s games

 

Build Expressions to 20

 

Count On/Back Addition and Subtraction

(hover at top of page to choose activity)

 

Owl Addition

 

Ogre Addition

 

Addition Machine

 

Matho – Addition or Subtraction – Easy Level

 

Mothmatic Subtraction

 

That’s a Fact

(can choose vertical or horizontal algorithms)

 

• use the equals sign to record equivalent number sentences involving addition, and to mean 'is the same as', rather than as an indication to perform an operation, eg 5 + 2 = 3 + 4

    * check given number sentences to determine if they are true or false and explain why, eg 'Is 7 + 5 = 8 + 4 true? Why or why not?' (Communicating, Reasoning)