Math · Topic 68 of 124
Doubling and Halving
⭐ MasteredDoubling means multiplying by 2, and halving means dividing by 2. These quick tricks are useful for mental maths, like doubling 15 to make 30.
💡 Fun fact
Doubling a number is the same as multiplying it by two, which is why it feels like a faster sum.
All about Doubling and Halving
Doubling means multiplying a number by 2, and halving means dividing it by 2. These two ideas are opposites, so doubling and then halving brings you back to the start. They are quick tools for mental maths.
Doubling is useful when you multiply by 4, since doubling twice does the job. For example, 7 × 4 is the same as doubling 7 to get 14, then doubling 14 to get 28. Halving helps when sharing things fairly between two people.
🎮 Try it yourself!
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