Where does the decimal point go? — Maths trick for kids

The trick

Count the places — “digits after the point in the answer = digits after the points in the question”

1. Forget the points and multiply the whole numbers.
2. Count all the digits after the points in the question.
3. Put the point that many places from the right, then check by rounding.

Use it for: Money in rupees and paise, lengths in metres, weights in kilograms, and decimal sums in Classes 5 to 7.

Worked example: 3.4 × 2.1 — where does the decimal point go? → 7.14

✏️ Practice

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

🏁 Trick 24 test

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

🏅 Sign in with Google to earn the 📍 Point Pro badge when you pass — and a certificate when you finish all 10 tricks of Part 4 · Clever counting & checking. You can still take the test without signing in.

🖨️ Multiplying Decimals Worksheet

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