New
New
Year 5

# Use knowledge of place value to calculate with decimal numbers up to and bridging one tenth

I can use knowledge of place value to calculate with decimal numbers up to and bridging one tenth.

New
New
Year 5

# Use knowledge of place value to calculate with decimal numbers up to and bridging one tenth

I can use knowledge of place value to calculate with decimal numbers up to and bridging one tenth.

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## Lesson details

### Key learning points

1. 10 one hundredths is equal to one tenth or 0.1
2. If 7 + 3 is equal to 10 then 7 hundredths + 3 hundredths is equal to 10 hundredths which is equal to one tenth 0.1
3. Number facts and place value can be applied when adding hundredths which bridge one tenth.

### Common misconception

Pupils use a known fact but add or subtract with different place values (e.g. 0.6 + 0.04 = 0.1).

Unitise through the use of language to help identify this for pupils. For example: 6 hundredths plus 4 hundredths is equal to 10 hundredths.

### Keywords

• Number fact - A simple calculation using two numbers.

• Bridge / bridging - A mental strategy which uses addition or subtraction to cross a number boundary.

Give children the opportunity to explore and compare a range of numbers for which they can apply using known facts to. In particular, allow pupils to discern between numbers that look similar (e.g 0.4 and 0.04).
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).

## Starter quiz

### 6 Questions

Q1.
Tick the number facts that make 10.
4 + 7
6 + 5
Q2.
Ten hundredths are equal to _________.
one
ten tenths
Q3.
Tick all of the equations that can represent this part-part-whole model.
10 = 7 – 3
Correct answer: 10 = 7 + 3
Correct answer: 7 + 3 = 10
Correct answer: 3 + 7 = 10
Correct answer: 10 – 3 = 7
Q4.
I know 6 + 3 = 9 so 60 + 30 =
Q5.
I know 6 + 3 = 9 so 0.6 + 0.3 =
Correct Answer: 0.9, zero point nine, nine tenths
Q6.
Tick the correct equations.
Correct answer: 1.4 – 0.6 = 0.8
14 – 0.6 = 0.8
6 + 0.8 = 1.4
0.6 + 0.8 = 14
Correct answer: 0.6 + 0.8 = 1.4

## Exit quiz

### 6 Questions

Q1.
I know 4 + 5 = 9 so 0.04 + 0.05 =
Correct Answer: 0.09 , 9 hundredths , Zero point zero nine
Q2.
I know 7 − 4 = 3 so 0.07 − 0.04 =
Correct Answer: 0.03 , 3 hundredths , Zero point zero three
Q3.
Which of these pairs of numbers sum to make 0.1?