Activities to develop understanding of decimal fractions with a single decimal place.

• ### Decimals Tenths: Introduction

Tenths introduced as a tenth of a one block.

• ### Decimals Tenths: Number Expander

Use a number expander to show, for example, 2.3 as 23 tenths.

• ### Decimals Tenths: Addition & Subtraction

Add and subtract tenths without regrouping.

• ### Decimals Tenths: Before & After

Find numbers one tenth before and after a number.

• ### Decimals Tenths: Counting

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

• ### Decimals Tenths: Comparing

Compare numbers with tenths, allowing for ordering and sequencing.

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• ### Decimals Tenths: Subtraction Regrouping

Subtract tenths with regrouping.

• ### Decimals Tenths: Abacus

Use an abacus to compare decimals to tenths

• ### Decimals Tenths: Advanced Regrouping

Regroup decimals such as 2.3 as 1 one and 13 tenths.

• ### Decimals Tenths: Software Dice Game

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

• ### Tenths as Decimals [PowerPoint TBM405]

39 slides. Connects common fraction tenths with decimals. Includes folding paper, number lines, base ten blocks, shapes of mixed numbers, and Ones and tenths. Interactive PowerPoint Think Bubble Math 405

• ### Tenths as Decimals

3 pp. Mulitple shapes, and number lines for connecting tenths with decimals.Worksheets to accompany “Tenths as Decimals” [PowerPoint TBM405]

• ### Tenths and Hundredths [PowerPoint TBM502]

40 slides. Tenths and hundredths linked to common fractions. Convert between them with a number expander. 10 hundredths is 1 tenth. Locate on number lines. Interactive PowerPoint Think Bubble Math 502

• ### Tenths Worksheet A

1 p. Draw common fractions, decimals and locations on a number line. Use with “Tenths and Hundredths” [PowerPoint TBM502]

• ### Tenths, Hundredths Number Expander

1 p. Number Expander with ones, tenths and hundredths. Use with “Tenths and Hundredths” [PowerPoint TBM502]

• ### Tenths, Hundredths Worksheet B

1 p. Draw common fractions, decimals, locations on number lines and number expander use.Use with “Tenths and Hundredths” [PowerPoint TBM502]

• ### Rounding and Estimating [PowerPoint TBM503]

33 slides. Rounding numbers to tens, hundreds, and decimals to ones. Using rounding in estimating answers and shopping. Interactive PowerPoint Think Bubble Math 503

• ### 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: 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.

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

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

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### Multiplication Advanced: Multiply Whole by Tenths

Tutorial-style worksheets to explain to students what is happening when a whole number is multiplied by a tenth. Contains practice examples.

• ### Multiplication Advanced: Multiply Tenths by Tenths

Tutorial-style worksheets to explain to students what is happening when tenths are multiplied by tenths. Contains practice examples.

• ### Multiplication Advanced: Multiply Wholes & Tenths by Tenths

Tutorial-style worksheets to explain to students what is happening when whole numbers and tenths are multiplied by tenths. Contains practice examples.

• ### Multiplication Advanced: Poster Set Multiply Decimals by Decimals

Poster set: Pictorial representation of what happens when wholes and decimals are multiplied. Resize as desired, print and laminate.

• ### 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.

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### 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.