Mental maths · lesson 16 of 28 · free

Change from ₹100 and ₹500 — Mental Maths Mastery

Shopkeepers rarely subtract — they count up from the price to the note you gave. Jump to the next ten, then the next hundred, then up to the note.

▶ Watch how it works

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How to do it in your head

Shopkeeper’s count — “count up from the price to the note”

  1. If there are two things, add the prices first.
  2. Count up from the cost: to the next ten, to the next hundred, then to the note.
  3. Add the jumps — that is your change.

Use it for: Shopping, checking the change you get back, and planning how much money you need.

Worked example: You buy a kite for ₹37 and pay with a ₹100 note. How much change do you get, in rupees? → 63

  1. 37 → 40 is 3.
  2. 40 → 100 is 60.
  3. 3 + 60 = 63.

Check: 37 + 63 = 100 ✓

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✓ Written and checked by the TalentJR team · Updated 13 Oct 2026 · How we make our lessons

✏️ Practice

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🏁 Lesson 16 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

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🖨️ Money Change Mental Maths Worksheet

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