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KS1 (Age 5-7)KS2 (Age 7-11)11 Plus (Age 7-11)KS3 (Age 11-14)GCSE (Age 14-17)PSHEA.I.ESLSpanishSpecialistGames
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The 20 Times Table
An easy table to finish on.

The 20 Times Table

Learn the 20 times table with place value tricks. Build speed and use twenty facts to scale measures, money, and time.

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Fascinating Fact:

A class of 20 students is 20 times larger than a one-to-one tutoring session.

In KS3 Maths, mastering the 20 times table is all about place value. Because 20 = 2 × 10, you can double a number and then add a zero, or use 20n = (10n) × 2 for quick mental calculations in measures, money, and time.

Key Terms

  • Multiple: A number in the 20 times table (20, 40, 60, 80, …).
  • Factor: A whole number that divides another exactly (for 20: 1, 2, 4, 5, 10, 20).
  • Place value: Using the value of digits (like tens) to make multiplication easier, e.g., 20 × n = 2 × (10 × n).

Want a quick drill before the FAQs? Try the Multiplication Game to test your 20× facts at speed.

Frequently Asked Questions (Click to see answers)

What is the easiest way to do 20 times a number?

Use place value: 20 × n = (2 × n) with a zero added, or 20 × n = (10 × n) × 2. Pick the one you can do fastest.

How can I tell if a number is a multiple of 20?

A number is a multiple of 20 if it is divisible by 4 and by 5. A quick check is that it ends in 0 and the tens digit is even.

Where do we use 20× in real life?

Pricing in twenties, packs of 20, time blocks of 20 minutes, scaling drawings, and converting measures often use 20× for fast mental maths.

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Author:  Frank Evans (Specialist 11 Plus Teacher and Tutor)
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