Addition questions that require a method that goes beyond memorization of number facts. This is generally done using a written algorithm.

• ### Addition of 2 Digit Numbers with Regrouping [PowerPoint TBM206]

50 slides. Adding 2 digit numbers with regrouping using number lines, open (empty) number lines, hundred board and base ten materials. Interactive PowerPoint Think Bubble Math 206

• ### Addition of 2 Digit Numbers with Regrouping WS

6 pp. Worksheets to accompany Interactive PowerPoint Think Bubble Math 206.

• ### Addition of 2- and 3-Digit Numbers, regrouping above answer [PowerPoint TBM306 v1]

41 slides. Visual presentation of adding multiple 2-digit numbers and 3-digit numbers. 4 lessons. Regrouping included; regrouped digits are above the answer (v2 available; regrouped digits above the top numeral). Interactive PowerPoint Think Bubble Math 306

• ### Addition of 2- and 3-Digit Numbers, regrouping above top addend [PowerPoint TBM306 v2]

41 slides. Visual presentation of adding multiple 2-digit numbers and 3-digit numbers. 4 lessons. Regrouping included; regrouped digits are above the top numeral (v1 available; regrouped digits above the answer). Interactive PowerPoint Think Bubble Math 306

• ### Addition of 2 and 3 Digit Numbers with Regrouping WS

4 pp. Worksheets to accompany Interactive PowerPoint Think Bubble Math 306.

53 slides. Visual presentation of adding multiple 3 digit numbers and 4 digit numbers. 4 lessons. Regrouping included; regrouped digits are above the answer (v2 available; regrouped digits above the top numeral). Interactive PowerPoint Think Bubble Math 406 v1

• ### Addition with Decimals, regrouping above top addend [PowerPoint TBM406 v2]

53 slides. Visual presentation of adding multiple 3 digit numbers and 4 digit numbers. 4 lessons. Regrouping included; regrouped digits are above the top numeral (v1 available; regrouped digits above the answer). Interactive PowerPoint Think Bubble Math 406 v2

• ### Addition with Decimals WS

4 pp. Worksheets to accompany Interactive PowerPoint Think Bubble Math 406.

Addition facts with vertical and horizontal layouts.

Adding 2-digit and 1-digit numbers with no regrouping. Includes vertical and horizontal layouts.

Adding 2-digit and 2-digit numbers with no regrouping. Includes vertical and horizontal layouts.

Adding 2-digit and 1-digit numbers with regrouping. Includes vertical and horizontal layouts.

Adding 2-digit and 2-digit numbers with regrouping. Includes vertical and horizontal layouts.

Adding 3-digit and 2-digit numbers with regrouping. Includes vertical and horizontal layouts.

Adding 3-digit and 3-digit numbers with regrouping. Includes vertical and horizontal layouts.

• ### Addition: 4-Digit and 3-Digit with Horizontal

Adding 4-digit and 3-digit numbers with regrouping. Includes vertical and horizontal layouts.

• ### Addition: 4-Digit and 4-Digit with Horizontal

Adding 4-digit and 4-digit numbers with regrouping. Includes vertical and horizontal layouts.

• ### Addition: 5 or More Digits

Adding 5-digit and larger numbers with regrouping. Includes vertical and horizontal layouts.

• ### Addition: Tenths, 2 and 3 Digits

Addition questions of 2- or 3-digit numbers which include tenths. Algorithm is vertical but some questions are presented horizontally, requiring students to rewrite the question vertically to solve.

• ### Addition: Hundredths, 3 and 4 Digits

Addition questions of 3- or 4-digit numbers which include hundredths. Algorithm is vertical but some questions are presented horizontally requiring students to rewrite the question vertically to solve.

• ### Addition: Thousandths, 4 and 5 Digits

Addition questions of 4- or 5-digit numbers which include thousandths. Algorithm is vertical but some questions are presented horizontally requiring students to rewrite the question vertically to solve.

• ### Mental Strategies: Adding Nice Numbers

Adding strings of numbers by finding pairs of numbers that go together nicely.

• ### Mental Strategies: Adding Near 100

Adding numbers that are near to 100, such as 99 or 95 by adjusting the number added.

• ### Mental Strategies: Subtracting Near 100

Subtracting numbers that are near to 100, such as 99 or 95 by adjusting the number subtracted.

• ### Mental Strategies: Revision

Revise all mental strategies in the series.

• ### Mental Strategies: Assessment

Set of 5 assessment tests to check on how students are progressing with each of the units in the Mental Strategies series of worksheets.

• ### Mental Strategies: Homework

Set of 10 homework sheets to match each of the sets in the Mental Strategies series. Contains information for parents.

Order of operations with addition and subtraction number facts, without brackets or parentheses. Also includes all operations number fact revision.

Order of operations with addition and subtraction number facts with brackets or parentheses. Also includes all operations number fact revision.

• ### Teaching Strategies – Model Simple Problems

Notes on how to model problem solving and to write the number sentence.

• ### Teaching Strategies – Writing Number Sentences

Notes on how to model problem solving and to write the number sentence.

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### Scrolling Hundred Board Quick Start Guide

6pp. Features and funcitons of the Scrolling Hundred Board Gadget: A hundred board that scrolls from 0 to 2000. Scrolling arrows and options allow for counting, highlighting multiples and special numbers.

• ### Scrolling Hundred Board: Teaching Strategies Activities

20pp. Activites and ideas for using the Scrolling Hundreds Board. Matching lesson plans, templates and worksheets are available as other resources.

• ### Scrolling Hundred Board: Addition

10pp. Adding using the Scrolling Hundreds Board. Includes activities ranging from simple 2 digit plus 1 digit, through to 3 digit plus 3 digit with regrouping.

• ### Easter Colouring In – The Cross (Four Operations)

Page revises all four operations in a fun colouring-in activity.

• ### Easter Colouring In – Egg Hider (Four Operations)

Page revises all four operations in a fun colouring-in activity.

• ### ANZAC Colouring In – Simpson & Donkey (Four Operations)

Page revises all four operations in a fun colouring-in activity.