Activities to develop understanding of decimal fractions with three decimal places.

• ### Decimals Thousandths: Introduction

Thousandths introduced as tenths of a hundredth block.

• ### Decimals Thousandths: Number Expander

Use a number expander to show 0.357 as 357 thousandths.

• ### Decimals Thousandths: Add Subtract Thousandths without Regrouping

Add and subtract thousandths without regrouping.

• ### Decimals Thousandths: Before & After

Find numbers one thousandth before and after a number.

• ### Decimals Thousandths: Counting

Count in thousandths by 1s, 2s and 5s in any number.

• ### Decimals Thousandths: Comparing

Compare numbers with thousandths, allowing for ordering and sequencing.

• ### Decimals Thousandths: Subtraction Regrouping

Subtract thousandths with regrouping.

• ### Decimals Thousandths: Abacus

Use an abacus to compare decimals to thousandths

• ### Decimals Thousandths: Advanced Regrouping

Regroup decimals such as 0.357 as 30 hundredths and 57 thousandths.

• ### Decimals Thousandths: Software Dice Game

Game that can be played using the thousandths random dice roller on Professor Pete’s Decimals software (separate purchase needed).

• ### Reading and Writing Numbers to Millions and Decimals [PowerPoint TBM509]

46 slides. Extends the reading and writing of number into the trillions and beyond. 4 lessons. Includes decimals to thousandths and fractions. Interactive PowerPoint Think Bubble Math 509

• ### Reading and Writing Numbers to Millions and Decimals WS

4 pp. Writing number into the millions. Worksheet accompanies “Reading and Writing Numbers to Millions” [PowerPoint TBM 509]

• ### Extreme Numbers [PowerPoint TBM609]

81 slides. Investigating numbers in the billions and beyond, also decimals beyond thousandths. Uses base ten blocks and place value charts, real world examples, rounding and calculating. Interactive PowerPoint Think Bubble Math TBM 609

• ### Extreme Numbers WS

4pp. Extreme numbers worksheet. Worksheet accompanies “Extreme Numbers” [PowerPoint TBM 609]

• ### Thousandths Introduced [PowerPoint TBM508]

75 slides. Thousandths linked to common fractions. Includes explorations with folded paper, division of shapes, base ten blocks and number lines. PowerPoint TBM508

• ### Thousandths Introduced WS

4 pp. Worksheets to accompany ‘Thousandths Introduced’ [PowerPoint TBM508]

• ### Multiply and Divide by 10, 100, 1000 [PowerPoint TBM601]

47 slides. Multiplying and dividing by 10, 100 and 1000 including number with decimals. Interactive PowerPoint Think Bubble Math 601

• ### Number Slide

1 p. Template to construct a number slide with 10 places millions to thousandths. Accompnaies “Multiply and Divide by 10, 100, 1000” [PowerPoint TBM601]

• ### 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.

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

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

• ### Mental Strategies: Teaching Strategies

Teacher notes: Strategies for the mental calculation of various mathematical questions.

• ### Mental Strategies: x by powers of 10

Multiplying by 10, 100 or 1000. Includes examples with decimals.

• ### Mental Strategies: Dividing by Powers of 10

Dividing by 10, 100 or 1000. Includes examples with decimals.

• ### 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.

• free

### Number Slide Quick Start Guide

5pp. Features and functions of the Number Slide Gadget: Multiply and divide numbers by powers of ten, with and without decimals.

• ### Number Slide Gadget Use

12pp.Sequence of lesson plans for the Number Slide Gadget.

• ### Number Slide Decimal x 0.1, 0.01, 0.001

10pp. Introduce x0.1 extending to x0.01 and 0.001.Use the Gadget to explore multiplying by a decimal. Includes lesson plans and worksheets.

• ### Number Slide Decimal ÷ 0.1, 0.01, 0.001

10pp. Introduce ÷0.1 extending to ÷0.01 and 0.001.Use the Gadget to explore dividing by a decimal. Includes lesson plans and worksheets.