Year 5

Year 5

# Deriving decimal addition and subtraction facts

## Lesson details

### Key learning points

1. In this lesson, we will add and subtract decimals using our known facts to help us.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

Share with pupils

## Worksheet

Share with pupils

## Starter quiz

Share with pupils

### 5 Questions

Q1.
True or false, when we multiply by 10, we add a 0?
True
Q2.
0.036 x 10 =
0.036
3.6
36
Q3.
"If I divide 6.23 by 100, the answer will be less than 1"
False
Q4.
The relationship between 0.15 and 150 is...
Multiply and divide by 10
Multiply and divide by 100
Correct answer: Multiply and divide by 1000
Q5.
2.5 x _____ = 250
10
1000

## Exit quiz

Share with pupils

### 5 Questions

Q1.
Which known fact will help me answer 30 + 40 and 0.03 + 0.04?
13 + 4 = 17
3 x 4 = 12
4 - 3 = 1
Correct answer: 7 = 3 + 4
Q2.
0.6 + 0.3 = ____
0.009
0.09
9
Q3.
If I know 4 + 5 = 9, then I know... (pick two)
Correct answer: 0.04 + 0.05 =
0.4 + 0.09 =
0.5 x 0.4 =
Correct answer: 0.9 - 0.4 =
Q4.
If I know 15 + 4 = 19, then I know... (pick two)
0.04 + 0.015 =
Correct answer: 0.15 + 0.04 =
0.15 + 0.4 =
Correct answer: 1.5 + 0.4 =
Q5.
What is 0.06 - 0.02?
0.004