Solve problems with numbers with up to 3 decimal places | Maths

Starter quiz

How many mm are there in 1 cm?

'10' ✓
How many mm are there in 0.025 m?

0.025

5

25 ✓

250
How many mm are there in 0.5 m?

'500' ✓
0.008 + 0.003 =

'0.011' ✓
What is the difference between 0.524 and 0.529?

'0.005' ✓
What operation is required to find the missing value?

addition ✓

subtraction

multiplication

division

Tick the known fact that could help you to solve: 0.004 + 0.005 = ?

4 + 5 = 9 ✓

2 + 7 = 10

6 + 3 = 9

8 + 1 = 9
The centre of the net should be 0.914 m tall. At the moment, the height of the net is 0.921 m tall. How much should the net be lowered by? ______ mm

'7' ✓
Which bar model represents the equation? 200 mm + 70 mm = ?
In one week, 0.046 m of rain fell. The next week, 0.015 m of rain fell. How much rain fell in total over the two weeks? Give your answer in metres.

'0.061 m' ✓
One parcel weighs 0.4 kg and one parcel weighs 1.37 kg. How much do they weigh altogether? Give your answer in kilograms.

'1.77 kilograms' ✓
Order these lengths from longest to shortest.

1

⇔

4 m

2

⇔

0.4 m

3

⇔

0.39 m

4

⇔

0.375 m

5

⇔

0.004 m

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Apply known facts and place value to solve problems involving up to 3 decimal places.
Extend column addition and subtraction to include numbers with up to 3 decimal places.
Use number facts to 10 to bridge through ones, tenths and hundredths.

Pupils may look to adopt a formal written strategy straight away when this is not necessary.

Share different strategies utilised by pupils within the lesson and compare these to expand pupils' understanding of efficiency.

Represent - A representation is a way of showing a mathematical idea. Concrete objects, pictures and symbols can all be used to represent mathematics.
Operation - A mathematical process such as addition, subtraction, multiplication or division can be described as an operation.
Efficient - An efficient strategy is a way of solving a problem that is accurate and can be done more quickly than others.