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## Grade 1 Hong Kong School Math Subtracting Doubles

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*Subtraction Strategies* 1.1. Longer and Shorter

1.2. Longest and Shortest

1.3. Bigger and Smaller

1.4. Biggest and Smallest

1.5. Taller and Shorter

1.6. Tallest and Shortest

1.7. Thicker and Thinner

1.9. Heavier and Lighter

1.10. Heaviest and Lightest

1.11. Near and Far

1.12. More and Less

2.1. Top and Bottom

2.2. On and Under

2.3. Above and Below

2.4. Inside and Outside

2.5. Left and Right

2.6. Behind and Front

2.7. Closed and Open

2.8. Before and After

3.1. Counting Numbers

3.2. Number Names

3.3. Comparing Numbers

3.5.1. By Using Number Line

3.6. Ordinal Numbers

3.7. Number Combinations

3.7.1. To form the Number 1

3.7.2. To form the Number 2

3.7.3. To form the Number 3

3.7.4. To form the Number 4

3.7.5. To form the Number 5

3.7.6. To form the Number 6

3.7.7. To form the Number 7

3.7.8. To form the Number 8

3.7.9. To form the Number 9

3.7.10. To form the Number 10

6.4. Place Value

6.7. Expanded Form

6.7.1. Numerals in Expanded Form

6.7.2. Numerals in Short Form

6.9. Comparing Numbers

7.2.2. Addition to Make 10

7.3. Addition Sentences

7.4. Add and Compare

7.6. Addition of Zero

7.7. Addition Strategies

8.3. Subtract and Compare

8.4.1. Subtracting 1

8.4.2. Subtracting 2

8.4.3. Subtracting 3

8.4.4. Subtracting 4

8.4.5. Subtracting 5

8.4.6. Subtracting 6

8.4.7. Subtracting 7

8.4.8. Subtracting 8

8.4.9. Subtracting 9

8.4.10. Subtraction From 10

8.4.11. Subtraction From 20

8.5. Subtraction of Zero

10.1. Addition

10.1.2. Column Addition

10.1.2.2. Add Two Two-Digit Numbers

10.1.2.2.1. Add Two Two-Digit Numbers (Without Carrying)

10.1.2.2.2. Add Two Two-Digit Numbers (With Carrying)

10.2. Subtraction

10.2.2. Column Subtraction

10.2.2.2. Subtract Two Two-Digit Numbers

10.2.2.2.2. Subtract Two Two-Digit Numbers (With Borrowing)

11. Multiplication

12. Skip Counting

12.1. Skip Counting by 2

12.2. Skip Counting by 3

12.3. Skip Counting by 4

12.4. Skip Counting by 5

12.5. Skip Counting by 6

12.6. Skip Counting by 7

12.7. Skip Counting by 8

12.8. Skip Counting by 9

12.9. Skip Counting by 10

13.1. Patterns

13.1.1. Introduction to Pattern

13.1.2. Pattern in Alphabets

13.1.3. Pattern in Shapes

13.1.4. Pattern in Numerals

13.1.5. Odd One Out

13.2. Shapes

13.2.1. Plane Shapes (2-D shapes)

13.2.1.1. Open and Closed Shapes

13.2.2. Solid Shapes (3-D shapes)

13.2.2.2. Solid Shapes Around Us

13.2.2.5. Identify Sliding and Rolling Objects

14. Time

14.1. Concept of Day and Night

14.3. Use of 'AM' and 'PM'

14.4. Clock

14.5. Calendar

14.5.1. Days of the Week

14.5.2. Months of the Year

14.5.3. Reading a Calendar

14.5.4. Seasons of the Year

15. Probability