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).

• ### Spelling Numbers to 99,999.99 [PowerPoint TBM409]

47 slides. Reading and spelling numbers to 99,999.99. 4 lessons. Includes tens of thousands fractions and decimals. Interactive PowerPoint Think Bubble Math 409

• ### Spelling Numbers to 99,999.99 WS

4pp. Writing numbers to 99,999.99. Worksheet accompanies “Spelling Numbers to 99,999.99” [PowerPoint TBM 409]

• ### 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]

• ### 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 WS

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

• ### Hundredths as Decimals [PowerPoint TBM408]

82 slides. Connects common fraction hundredths with decimals. Includes number lines, base ten blocks, shapes of mixed numbers of ones, tenths and hundredths.. Interactive PowerPoint Think Bubble Math 408

• ### Hundredths as Decimals WS

3 pp. Multiple shapes, and number lines for connecting hundredths with decimals. Worksheets to accompany “Hundredths as Decimals” [PowerPoint TBM408]

• ### 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]

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.

• ### 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.