S2 Addition and Subtraction 2

• select, use and record a variety of mental strategies to solve addition and subtraction problems, including word problems, with numbers of up to and including five digits, eg 159 + 23: 'I added 20 to 159 to get 179, then I added 3 more to get 182', or use an empty number line:

*pose simple addition and subtraction problems and apply appropriate strategies to solve them (Communicating, Problem Solving)

Number line - can set numbers,

increments, and choose addition or subtraction

Math Madness Addition, Subtraction, Multiplication Games

Subtraction Speed Grid

Word Problems with Katie

Grand Slam Maths

Word Problem Index -

large variety of Add/Sub problem types)

Quick Calculate

Add combinations from units to hundreds

Thinking Blocks + and – Word Problems

Number Stacker

• use a formal written algorithm to record addition and subtraction calculations involving two-, three-, four- and five-digit numbers, eg

Subtract to 3 Digits

Add to 5 Digits

• solve problems involving purchases and the calculation of change to the nearest five cents, with and without the use of digital technologies (ACMNA080)

Maths at the Mall (Toys & Cafe)

Change Maker

Making Change

Round to 5 Cents (word problems)

Round to Nearest 5 Cents

CONTENT

Students:

Apply place value to partition, rearrange and regroup numbers to at least tens of thousands to assist calculations and solve problems (ACMNA073)

OUTCOMES

A student:

› uses appropriate terminology to describe, and symbols to represent, mathematical ideas MA2-1WM

› selects and uses appropriate mental or written strategies, or technology, to solve problems MA2-2WM

› checks the accuracy of a statement and explains the reasoning used MA2-3WM

› uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers MA2-5NA

Addition and Subtraction 2

• solve addition and subtraction problems involving money, with and without the use of digital technologies

* use a variety of strategies to solve unfamiliar problems involving money (Communicating, Problem Solving)