Maths Monster
OPV.5.5

Using calculators with directed numbers

Use a calculator for directed number calculations

3 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.

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1:28
Grade 1–4 Core 🇬🇧 UK

Calculator Tutorial 4: Negative numbers on a scientific calculator

Science Made Simple 109K views

Shows exactly how to use the (-) key to enter negatives on a scientific calculator.

9:01
Grade 1–4 Core 🇬🇧 UK

Adding and Subtracting Negative Numbers

Maths Genie 109K views

Maths Genie walks through adding and subtracting negatives, the skill your calculator work relies on.

0:55
Grade 1–4 Core 🇬🇧 UK

How to square negative numbers (using a calculator)

CorridorMaths 850 views

Corbettmaths clearly explains adding and subtracting positive and negative numbers.