Decimal point jumps — Speed Calculation

The fast method

Jump the point — “one jump for each zero: right for ×, left for ÷”

1. Count the zeros: 10 → 1 jump, 100 → 2 jumps, 1000 → 3 jumps.
2. × moves the point right; ÷ moves it left.
3. Run out of digits? Fill the gaps with 0s. Drop 0s at the end of a decimal: 3.40 is 3.4.

Use it for: Changing units (cm to m, g to kg, paise to rupees), metric conversions in science, and decimals in Class 5–7.

Worked example: 7.5 ÷ 1000 = 0.0075

✏️ Practice

Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.

🏁 Lesson 17 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 2 min.

🏅 Sign in with Google to earn the 🦘 Point Jumper badge when you pass — and a certificate when you finish all 10 lessons of Part 4 · Speed decimals, fractions and percentages. You can still take the test without signing in.

🖨️ Multiply and Divide Decimals by 10, 100, 1000 Worksheet

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)