Students learn the subtraction facts that are the reverse of the addition facts to 20. These resources are designed for students who are learning the facts to 20 for the first time.

45 slides. Visual presentations of stories about adding and subtracting with and without the “+” and “–” signs. Includes ten frame representations of the operation. Interactive PowerPoint Think Bubble Math 005

• ### Doubling and Halving to 20 [PowerPoint TBM203]

35 slides. Doubling and halving numbers to 20. Mental strategy used with ten frames to encourage subitizing of answers. Counters animate. Interactive PowerPoint Think Bubble Math 203

• ### Count On and Back 1, 2, 3 [PowerPoint TBM102]

32 slides. Adding and subtracting using count on and back 1, 2, 3. Use number lines to help students count. Interactive PowerPoint Think Bubble Math 102

• ### Count On and Back 1, 2, 3

4 pp. Adding and subtraction using count on and back 1, 2, 3. Worksheets accompany “Count On and Back 1, 2, 3” [PowerPoint TBM102]

• ### Building to Ten, Rainbow Facts [PowerPoint TBM104]

39 slides. Addition and related turnaround facts linked with subtraction to make 10. Uses ten frames to visually link the fact families Rainbow facts are explored. Interactive PowerPoint Think Bubble Math 104

• ### Single Ten Frame

1 p. Single ten frame for duplication. There are two ten frames on the sheet. Print one per two students. Cut and laminate. Use with “Building to Ten, Rainbow Facts” [PowerPoint TBM104]

• ### Let’s Go Book 3: Subtraction

[Members-only eBook] Complete 10-week program to teach Year 2 subtraction number facts to 18-9. Includes checkup worksheets A to E, weekly homework sheets and all answer keys

• ### 10 Minutes a Day Level 1 Book 2: Subtraction

[Members-only eBook] Complete 10-week program to teach Year 3 subtraction number facts to 18-9. Includes checkup worksheets A to E, weekly homework sheets and all answer keys

• ### Introductory Subtraction: Count Back 1, Difference of 1

Introduction to the strategy of “Count back 1”, using ten frames and number line for subitizing answers. Includes turnaround facts and missing number questions.

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### Introductory Subtraction: Count Back 2, Difference of 2

Introduction to the strategy of “Count back 2”, using ten frames and number line for subitizing answers. Includes turnaround facts and missing number questions.

• ### Introductory Subtraction: Count Back 3, Difference of 3

Introduction to the strategy of “Count back 3”, using ten frames and number line for subitizing answers. Includes turnaround facts and missing number questions.

• ### Introductory Subtraction: Rainbow Facts

Introduction to the strategy of “Rainbow Facts”, using ten frames for subitizing answers. Includes missing number questions.

• ### Introductory Subtraction: Special Cases

Introduction to the strategy of taking 0 and 10, using ten frames for subitizing answers. Includes turnaround facts and missing number questions.

• ### Introductory Subtraction: Halving

Introduction to the strategy of halving numbers, using ten frames for subitizing answers. Includes turnaround facts and missing number questions.

• ### Introductory Subtraction: Relate to Doubles Plus 1

Introduction to the strategy of subtraction related to “Doubles +1”, using ten frames for subitizing answers. Includes turnaround facts and missing number questions.

• ### Introductory Subtraction: Near 10 Minus 9, Difference of 9

Introduction to the strategy of “-9, Near 10”, using ten frames for subitizing answers. Includes turnaround facts and missing number questions.

• ### Introductory Subtraction: Near 10 Minus 8, Difference of 8

Introduction to the strategy of “-8, Near 10”, using ten frames for subitizing answers. Includes turnaround facts and missing number questions.

• ### Introductory Subtraction: Remaining Facts & Revision

Revises all previsously learned subtraction facts to 20.

• ### Introductory Subtraction: Assessment

Set of 5 assessment tests to check on how students are progressing with each of the units in the Easy Subtraction Number Facts series of worksheets.

• ### Introductory Subtraction: Homework

Set of 10 homework sheets to match each of the sets in the Easy Subtraction Number Facts series. Contains information for parents.

• ### Subtraction Flashcards Facts to 20: Count Back, Difference of 1, 2, & 3

Flashcards for the easiest subtraction facts of -1, -2 and -3. Print, cut in half and laminate.

• ### Subtraction Number Facts: Teaching Strategies

Teaching Teacher notes: Strategies to teach all the subtraction facts. Count back, halving, rainbows etc are all shown in detail.

Template: Blank fact families sheet ready for the teacher to fill in as extra practice of all addition and matching subtraction and turnaround facts.

• ### Gadgets Number Facts: +1

Fact Families for the +1 facts. Match the addition with the subtraction and turnaround facts.

• ### Gadgets Number Facts: +2

Fact Families for the +2 facts. Match the addition with the subtraction and turnaround facts.

• ### Gadgets Number Facts: +3

Fact Families for the +3 facts. Match the addition with the subtraction and turnaround facts.

Fact Families for the Rainbow facts. Match the addition with the subtraction and turnaround facts.

• ### Gadgets Number Facts: +0 & +10

Fact Families for the +0 +10 facts. Match the addition with the subtraction and turnaround facts.

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Fact Families for the Double facts. Match the addition with the subtraction and turnaround facts.

Fact Families for the Double +1 facts. Match the addition with the subtraction and turnaround facts.

• ### Gadgets Number Facts: +9 Near 10

Fact Families for the +9 near 10 facts. Match the addition with the subtraction and turnaround facts.

• ### Gadgets Number Facts: +8 Near 10

Fact Families for the +8 near 10 facts. Match the addition with the subtraction and turnaround facts.