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).

• ### 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.