New
New
Year 3

Addition by bridging through 10

I can add two numbers by bridging through ten.

New
New
Year 3

Addition by bridging through 10

I can add two numbers by bridging through ten.

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Lesson details

Key learning points

  1. Partitioning addends supports bridging 10.
  2. Pairs to 10 can be used to add two or more addends.

Common misconception

Pupils partition one of the addends incorrectly to help them bridge ten.

Pupils use number pairs that total ten to help them partition the addend. They consider what they have to add to make ten.

Keywords

  • Bridge - Bridging is a mental strategy which uses addition or subtraction to cross a number boundary.

  • Partition - Partition means splitting a number into parts.

Tens frames and number lines can represent problems involving bridging ten. Once pupils understand how to bridge ten, they can apply the same strategy to bridging twenty, thirty and other tens numbers.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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6 Questions

Q1.
Which of these are number pairs that total 10?
Correct answer: 6 and 4
8 and 1
9 and 2
Correct answer: 3 and 7
Q2.
Match the equation to the sum.
Correct Answer:3 + 3 =,6

6

Correct Answer:2 + 3 = ,5

5

Correct Answer:4 + 3 = ,7

7

Correct Answer:4 + 4 = ,8

8

Q3.
What addend is missing from this equation? 5 + = 10
Correct Answer: 5, five
Q4.
What is the missing addend? 10 + = 14
Correct Answer: 4, four
Q5.
What addend is missing from the bar model?
An image in a quiz
Correct Answer: 5, five
Q6.
The two missing addends in the equation have the same value. What is that value?
An image in a quiz
2
Correct answer: 3
4
6

6 Questions

Q1.
Look at the equation. How would you partition 6 to find the sum?
An image in a quiz
1 and 5
2 and 4
Correct answer: 3 and 3
Q2.
The number line shows an addition strategy. What number is missing from the number line?
An image in a quiz
Correct Answer: 2, two
Q3.
Alex adds two number cards together to make a total. Match the numbers to the sums.
An image in a quiz
Correct Answer:6 and 5 ,11

11

Correct Answer:5 and 7 ,12

12

Correct Answer:8 and 5 ,13

13

Correct Answer:7 and 8 ,15

15

Q4.
Izzy added together two numbers to make a sum. She represented her strategy on a number line. What equation did Izzy do?
An image in a quiz
8 + 6 = 14
7 + 7 = 14
10 + 4 = 14
Correct answer: 9 + 5 = 14
Q5.
What addend is missing from this equation? + 4 = 20
Correct Answer: 16, sixteen
Q6.
What addend is missing from the bar model?
An image in a quiz
Correct Answer: 6, six

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