Step-by-step Maths Level 2: Counting on to add
Part of the Step-by-step Maths Level 2 adding within 20 chapter. Chapter overview · whole chapter on one page
Counting on to add
To add, start at the bigger number. Then count on the smaller number.
Starting at the bigger number is quicker. For 5 + 8, start at 8 and count on 5.
Key ideas
- Start at the bigger number.
- Count on the smaller number.
- The total is the last number you say.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 8. It is quicker to count on from the bigger number.8
- Count on 5 more. Say 5 numbers after 8.8 + 5 = 13
- Write the answer. This is the last number we said.13
Check. Start at 5 and count on 8. You also reach 13.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 9. It is quicker to count on from the bigger number.9
- Count on 3 more. Say 3 numbers after 9.9 + 3 = 12
- Write the answer. This is the last number we said.12
Check. Start at 3 and count on 9. You also reach 12.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 7. It is quicker to count on from the bigger number.7
- Count on 6 more. Say 6 numbers after 7.7 + 6 = 13
- Write the answer. This is the last number we said.13
Check. Start at 6 and count on 7. You also reach 13.
Watch out. Count on from the bigger number. Do not start again at one.
Watch out
Watch out. Do not start at 1 and count everything. Start at the bigger number.
Exam tip
Grown-up tip. Use two cups of counters. Tip one into the other and count the total from the bigger cup.
Exercise 5A Practice: counting on to add
Non-calculatorMethod. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 6. It is quicker to count on from the bigger number.6
- Count on 6 more. Say 6 numbers after 6.6 + 6 = 12
- Write the answer. This is the last number we said.12
Check. Start at 6 and count on 6. You also reach 12.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 9. It is quicker to count on from the bigger number.9
- Count on 5 more. Say 5 numbers after 9.9 + 5 = 14
- Write the answer. This is the last number we said.14
Check. Start at 5 and count on 9. You also reach 14.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 2. It is quicker to count on from the bigger number.2
- Count on 1 more. Say 1 numbers after 2.2 + 1 = 3
- Write the answer. This is the last number we said.3
Check. Start at 1 and count on 2. You also reach 3.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 9. It is quicker to count on from the bigger number.9
- Count on 2 more. Say 2 numbers after 9.9 + 2 = 11
- Write the answer. This is the last number we said.11
Check. Start at 2 and count on 9. You also reach 11.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 5. It is quicker to count on from the bigger number.5
- Count on 3 more. Say 3 numbers after 5.5 + 3 = 8
- Write the answer. This is the last number we said.8
Check. Start at 3 and count on 5. You also reach 8.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 4. It is quicker to count on from the bigger number.4
- Count on 1 more. Say 1 numbers after 4.4 + 1 = 5
- Write the answer. This is the last number we said.5
Check. Start at 1 and count on 4. You also reach 5.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 8. It is quicker to count on from the bigger number.8
- Count on 8 more. Say 8 numbers after 8.8 + 8 = 16
- Write the answer. This is the last number we said.16
Check. Start at 8 and count on 8. You also reach 16.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 9. It is quicker to count on from the bigger number.9
- Count on 5 more. Say 5 numbers after 9.9 + 5 = 14
- Write the answer. This is the last number we said.14
Check. Start at 5 and count on 9. You also reach 14.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 8. It is quicker to count on from the bigger number.8
- Count on 4 more. Say 4 numbers after 8.8 + 4 = 12
- Write the answer. This is the last number we said.12
Check. Start at 4 and count on 8. You also reach 12.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 5. It is quicker to count on from the bigger number.5
- Count on 2 more. Say 2 numbers after 5.5 + 2 = 7
- Write the answer. This is the last number we said.7
Check. Start at 2 and count on 5. You also reach 7.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 7. It is quicker to count on from the bigger number.7
- Count on 6 more. Say 6 numbers after 7.7 + 6 = 13
- Write the answer. This is the last number we said.13
Check. Start at 6 and count on 7. You also reach 13.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 5. It is quicker to count on from the bigger number.5
- Count on 1 more. Say 1 numbers after 5.5 + 1 = 6
- Write the answer. This is the last number we said.6
Check. Start at 1 and count on 5. You also reach 6.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 3. It is quicker to count on from the bigger number.3
- Count on 1 more. Say 1 numbers after 3.3 + 1 = 4
- Write the answer. This is the last number we said.4
Check. Start at 1 and count on 3. You also reach 4.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 4. It is quicker to count on from the bigger number.4
- Count on 3 more. Say 3 numbers after 4.4 + 3 = 7
- Write the answer. This is the last number we said.7
Check. Start at 3 and count on 4. You also reach 7.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 8. It is quicker to count on from the bigger number.8
- Count on 7 more. Say 7 numbers after 8.8 + 7 = 15
- Write the answer. This is the last number we said.15
Check. Start at 7 and count on 8. You also reach 15.
Watch out. Count on from the bigger number. Do not start again at one.
Method. Start with the bigger number and count on the smaller number.
- Start at the bigger number, 9. It is quicker to count on from the bigger number.9
- Count on 7 more. Say 7 numbers after 9.9 + 7 = 16
- Write the answer. This is the last number we said.16
Check. Start at 7 and count on 9. You also reach 16.
Watch out. Count on from the bigger number. Do not start again at one.