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LearnClinical Maths FoundationsLesson overview

Lesson overview

Adding & Subtracting Clinical Quantities

Learn how to add quantities that belong together and subtract one total from another.
About 15 minutesClinical Maths FoundationsNo account required

Ready when you are

Start with short teaching slides, then answer the lesson questions. Your progress stays on this browser.

Practise this lesson

Written and reviewed by George Lambroglou, RN

Founder-led review · Last reviewed 18 September 2026 · No separate independent clinical review is claimed.

MethodologyEditorial policy

Learning outcomes

What you will learn

  • identify which quantities belong together
  • make sure the units match before adding
  • add whole numbers and decimals accurately
  • subtract one total from another
  • read a positive or negative answer correctly

Clinical connection

Why this matters

You will use these skills when you total fluid intake and output, work out how much of an infusion remains, add parts of a dose, and compare one quantity with another.

Lesson plan

How the lesson works

  1. 1

    Learn

    Short teaching slides explain one idea at a time with plain-language examples.

  2. 2

    Practise

    Answer calculation or scenario questions and receive immediate feedback.

  3. 3

    Finish

    Complete the lesson check and save your learning progress on this browser.

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