• ### Where are they now?

Uses concrete materials to model and solve addition action stories (1-10) involving join or combine using ‘make all / count all’ or counting on from known (‘trusted’) number

• ### Where to next?

Uses concrete materials where some items are concealed to solve addition problems to 20 using counting on strategies or part-part-whole knowledge

Poses and solves simple addition problems

• ### Where are they now?

Uses concrete materials to model and solve simple subtraction action stories (1-10) using a make-all/count-all’ strategy ie items are removed from a known collection and a new total is determined by counting the remainder.

• ### Where to next?

Uses concrete materials to solve simple subtraction problems (take 1, 2 or 3) or use materials to solve missing addend (5 and something makes 8) problems using ‘make-all/count-all’ strategy

• ### Purpose

Addition and subtraction are an important part of the skill set of a numerate person and are foundational skills for the other operations (multiplication and division) as well as for the larger body of mathematics.

• ### Building Addition and Subtraction skills:

#### Resources

Many of these activities are the same as those in the Part-Part-Whole section as the core concepts are identical. There is an added emphasis her on connecting these ideas to the language of addition and subtraction however.

### Activities and Assessments

Blank Beehives to 20 – concealed addition

Adapted from ‘Beehive’, Developing Efficient Numeracy Strategies Stage 1 page 34. NSW Department of Education and Training, Professional Support and Curriculum Directorate 2003

Focus: Adding two collections where one collection is visible, but the numer of the other collection is given verbally. Learning to quickly add two totals with less access to visual cues.

How: See Beehive Activity 5

Bees template

Blank Beehives to 20 – Subtraction

Adapted from ‘Beehive’, Developing Efficient Numeracy Strategies Stage 1 page 34. NSW Department of Education and Training, Professional Support and Curriculum Directorate 2003

Focus: Subtracting a small given number from a collection to find a total. Consolidating the concept of subtraction.

How: See Beehive Activity 4a

Beehives boards

Bees template

Blank Beehives to 10 – missing addend

Adapted from ‘Beehive’, Developing Efficient Numeracy Strategies Stage 1 page 34. NSW Department of Education and Training, Professional Support and Curriculum Directorate 2003

Focus: Coping with ‘difference’ problems, which may be solved either through addition or subtraction.

How: See Beehive Activity 6 sheet

Beehives boards

Bees template

Part-part whole board : Numerals and Collections

Focus: Finding the total of a numeral (hidden collection) and a physical collection. Learning to quickly add two totals with less access to visual cues.

Part-part-whole board

Focus: Finding the total of a numeral (hidden collection) and a printed collection (dots). Learning to quickly add two totals with less access to visual cues.

1-9 dot Spinner