NA2-3: Know the basic addition and subtraction facts.
Elaboration on this Achievement Objective
This means students will know the basic addition facts from 0 + 0 = 0 to 9 + 9 = 18. So 4 + 1 = 5, 8 + 6 = 14, and 9 + 3 = 12 are all basic addition facts. The basic subtraction facts are the subtraction equivalent of the addition facts, so 5 – 1 = 4, 5 – 4 = 1, 12 -3 = 9 and 12 – 9 = 3 are all examples. It is important that students understand the commutative property of addition (for example, 4 + 7 = 7 + 4), and the inverse nature of addition and subtraction (for example, 6 + 7 = 13 so 13 – 7 = 6), as a foundation for more difficult problems, as well as a way to connect basic facts. Students also need to encounter the unknown in different positions within their basic facts, for example, 4 + .gif){kind=small}
= 12 and – 5 = 8.
Teaching resources for this Achievement Objective
Level Two
Number and Algebra
Problem solving activities
This problem solving activity has a number (addition and subtraction) focus.
Level Two
Number and Algebra
The purpose of this activity is to support students using their knowledge of teen numbers to recall addition facts with nine.
Level Two
Number and Algebra
Numeracy activities
In this activity the students play a card game to practise their addition and subtractions facts.
Level Two
Number and Algebra
In this activity the students play a card game to practice their addition and subtractions facts.
Level Two
Number and Algebra
Units of Work
In this unit five-based bead strings and number lines are used to solve addition and subtraction problems. The aim is to get students that use an early additive strategy to solve problems using a tidy number strategy with 10.
Level Two
Number and Algebra
Figure It Out activities
This is a level 2 number activity from the Figure It Out series. It relates to Stage 5 of the Number Framework. A PDF of the student activity is included.
Level Two
Number and Algebra
Figure It Out activities
This is a level 2 number activity from the Figure It Out series. It relates to Stage 5 of the Number Framework.
Level Two
Number and Algebra
This activity encourages children to recall their basic addition and subtraction facts.
Level Two
Number and Algebra
Numeracy activities
This activity encourages students to recall their basic addition and subtraction facts.
Level Two
Number and Algebra
Figure It Out activities
This is a level 2 number activity from the Figure It Out series. It relates to Stage 5 of the Number Framework. A PDF of the student activity is included.
Level Two
Number and Algebra
Figure It Out activities
This is a level 2 number activity from the Figure It Out series. It relates to Stage 5 of the Number Framework.
Level Two
Number and Algebra
Units of Work
In this unit students are encouraged to abandon counting methods, in favour of using known doubles facts, to derive the answers to addition problems. Using doubles is more complex but more efficient.
Level Two
Number and Algebra
Numeracy activities
In this activity the purpose is to find out how many tens and ones blocks are hidden from a given total.
Level Two
Number and Algebra
In this activity the purpose is to find out how many tens and ones blocks are hidden from a given total.
Level Two
Number and Algebra
Problem solving activities
This problem solving activity has a number (addition and subtraction) focus.
Level Two
Number and Algebra
Figure It Out activities
This is a level 2 number and algebra strand activity from the Figure It Out series. It relates to Stage 5 of the Number Framework. A PDF of the student activity is included.
Level Two
Number and Algebra
This game allows students to practice their subtraction skills.
Level Two
Number and Algebra
Numeracy activities
This game allows students to practice their subtraction skills.
Level Two
Number and Algebra
Problem solving activities
This problem solving activity has a number focus.
Level Two
Number and Algebra
Figure It Out activities
This is a level 2 number activity from the Figure It Out series. It relates to Stage 5 of the Number Framework. A PDF of the student activity is included.
Level Two
Number and Algebra
Numeracy activities
The purpose of the activity is to practice addition basic facts
Level Two
Number and Algebra
The purpose of the activity is to practice addition basic facts
Level Two
Number and Algebra
Figure It Out activities
This is a level 2 number activity from the Figure It Out series. It relates to Stage 5 of the Number Framework. A PDF of the student activity is included.
Level Two
Level Three
Number and Algebra
Figure It Out activities
This is a level 2 and 3 number activity from the Figure It Out series. It relates to Stage 5 and 6 of the Number Framework.
Level Two
Number and Algebra
Figure It Out activities
This is a level 2 number activity from the Figure It Out series. It relates to Stage 5 of the Number Framework. A PDF of the student activity is included.