# NA2-6: Communicate and interpret simple additive strategies, using words, diagrams (pictures), and symbols.

This means students will be able to use words, symbols and diagrams to explain their number strategies to others. Recording also allows students to think through solutions to problems and allows them to reduce their working memory load by storing information in written form. This is particularly important for the solving of complex, multi-step problems. Students should be able to write the numerals for whole numbers, to 1000, and simple fractions. They should also be able to write addition, subtraction, multiplication and division equations with understanding of the meaning of these operations and of the equals sign as meaning “equal to”. Similarly they should know which operation to perform on a calculator if the numbers are beyond their mental range. Students should also be familiar with using empty number lines to record addition and subtraction strategies and of drawing arrays to record simple multiplication and division strategies. Formal written algorithms for multi-digit addition and subtraction should not be taught at Level Two until students have the place value knowledge required to understand them.

know addition facts

write additon facts as equations, e.g 2 + 7 =

interpret diagrams that represent equations

solve basic facts

select operation symbols ( +, -, x, ÷) to complete an equation

- Use addition and multiplication to find number combinations that 'make' a given result.

- Students will be able to explain their understanding of fair and equal.
- Students will be able to record the results of tug of war contests and see-saw balancing in diagrams and symbolic forms.

using pictures explore the idea of equality in equations

use compass bearings to describe positions

select an operation symbol to complete an equation

use a mental strategy (through tens) for addition and subtraction problems

show a strategy on a number line

write a number sentence

write a number sentence

- Recognise three numbers that are related through the operations of addition and subtraction.
- Recognise that there are two related addition and two subtraction equations in a ‘family of facts’.
- Write and read sets of related addition and subtraction equations.
- Explain, in their own words300

solve problems involving unknowns by using words, pictures, or symbols

- Continue a simple pattern.
- Generalise the pattern.