Patterns and number facts: Year 2: Planning tool

Expected level of development

Australian Curriculum Mathematics V9: AC9M2A02, AC9M2A03

Numeracy Progression: Additive strategies: P6, Multiplicative strategies: P4

At this level, students consolidate their knowledge of number facts up to 20 and are encouraged to practise these to aid recall. They learn number facts for addition and subtraction up to 20, becoming familiar with the different combinations. Students recall and demonstrate proficiency with multiplication facts for twos, and extend and apply facts to develop the related division facts using doubling and halving.

Provide opportunities for students to develop proficiency in automatic recall of the basic number facts associated with a mathematical operation. Use maths games that draw on additive or multiplicative thinking and use of number facts. Include strategy games to reach a target number or games that involve doubling and halving.

Number facts (additive thinking):

Use tens frames and counters to represent both addition and subtraction concepts focusing on the part-part-whole relationship and making explicit similarities and differences. Show how additive thinking connects addition and subtraction concepts using part-part-whole; with addition problems you know the parts and work out the whole while in subtraction problems you know the whole and one part and calculate the remaining part. Encourage the use of intuitive strategies including doubles, near doubles, counting on, combinations to 10 and bridging to 10, making explicit the patterns and connections noticed within the facts.

Number facts (multiplicative thinking):

Use hundreds charts to explore and represent doubling and halving patterns. Make explicit ways to find related number facts.

Teaching and learning summary:

Use maths games that draw on additive or multiplicative thinking.
Use tens frames to represent and solve addition and subtraction problems.
Partition and rearrange collections to practise and develop fluency with addition and subtraction facts to 20 leading to the recall of these facts.
Use hundreds charts to explore and represent doubling and halving patterns.

There is an opportunity to connect learning about, and applying:

addition and related subtraction facts to 20 (AC9M2N04)
multiplication and division by one-digit numbers (AC9M2N05).

Students:

describe, continue, and create number patterns resulting from performing addition or subtraction
recall addition facts up to 20 and related subtraction facts
represent and solve simple addition and subtraction problems using intuitive strategies
recall multiplication facts for twos
recognise doubling and halving patterns.

Some students may:

find teen numbers confusing, for example, they confuse fourteen and forty
write numerals in the wrong order, for example, write sixteen as 61, because 6 is heard first
reverse the numerals.

Refer to Common Misunderstandings - Level 2 Place-Value

The Learning from home activities are designed to be used flexibly by teachers, parents and carers, as well as the students themselves. They can be used in a number of ways including to consolidate and extend learning done at school or for home schooling.

Learning intention

We are learning to represent and use number bonds and related subtraction facts up to 20.

Why are we learning about this?

We are learning to recall and use addition and subtraction facts to 20 fluently.

What to do

Look at car number plates as you are travelling to school.

Make it a game to see if you can use the car registration numbers to solve addition and subtraction problems.
Make a total; add the digits of the number plate, for example, with the number plate RTS 328 the addition problem is 3 + 2 + 8 = 13.
Subtract from 20; subtract the total of the three numbers from 20, for example, with the number plate RTS 328 the subtraction from 20 number problem is 20 – 3 – 2 – 8 = 7.

Success criteria

I can:

recall basic addition and subtraction facts
solve one-step problems that involve addition and subtraction
recognise and use the relationship between addition and subtraction.

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