Speed calculation · lesson 11 of 25 · free

÷ 5, ÷ 25 and ÷ 50 — Speed Calculation

Dividing by 10 or 100 is easy — you just drop zeros. Dividing by 5, 25 or 50 becomes just as easy if you first double (or double twice), because 5 × 2 = 10, 25 × 4 = 100 and 50 × 2 = 100.

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The fast method

Double, then divide by 10 or 100 — “÷ 5 = × 2 ÷ 10, ÷ 25 = × 4 ÷ 100, ÷ 50 = × 2 ÷ 100”

  1. ÷ 5: double, then ÷ 10.
  2. ÷ 25: double twice (× 4), then ÷ 100.
  3. ÷ 50: double, then ÷ 100.

Use it for: Sharing money in ₹5, ₹25 or ₹50 parts, fractions, and long division checks.

Worked example: 675 ÷ 25 = 27

  1. Double 675: 1350. Double again: 2700.
  2. 2700 ÷ 100 = 27.

Check: 27 × 25 = 675 ✓

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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 11 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass — and beat the clock: finish within 3 min.

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🖨️ Divide by 5, 25 and 50 Worksheet

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