2.3.3

Add & Subtract Volumes

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Adding and Subtracting Volumes

We often need to add or subtract volumes with the same unit or different units.

Same units

Same units

  • You can add or subtract volumes with the same unit of measurement easily.
  • Use your normal addition or subtraction method.
  • Do not forget to write in the correct unit of measurement.
    • 3 Ɩ + 5 Ɩ = 8 Ɩ
    • 350 mƖ + 120 mƖ = 470 mƖ
Different units

Different units

  • If the units of measurement are mixed, it can help to work out the millilitres and litres separately.
  • For example, 3 Ɩ + 1,035 mƖ = ?
    • 3 Ɩ = 3,000 mƖ
    • 3,000 mƖ + 1,035 mƖ = 4,035 mƖ (or 4 Ɩ 35 mƖ).
Jump to other topics
1

Year 3 - Number

2

Year 3 - Measurement

3

Year 3 - Geometry

4

Year 3 - Statistics

5

Year 4 - Number

6

Year 4 - Measurement

7

Year 4 - Geometry

8

Year 4 - Statistics

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