Estimate products – multiply by larger numbers

key points :

What is Estimation? 🤔

Estimation means finding an approximate answer instead of the exact answer.

Helps to save time ⏱️

Useful for checking your answers ✅

Rounding Numbers 🔢

Before multiplying, round the numbers to the nearest:

10 (for tens)

100 (for hundreds)

1,000 (for thousands)

Example:

47 → 50

326 → 300

Estimate the Product ✖️

Steps:

Round each number.Multiply the rounded numbers.Write your answer as an approximation.

Example:

48 × 27 ≈ 50 × 30 = 1500

✅ Estimated product = 1500

When to Use Estimation 📌

Checking homework ✔️

Shopping 🛒

Quick calculations ⏩

Tips for Estimating 💡

If numbers are close to a multiple of 10, round them to 10s

If numbers are big, round to 100s or 1,000s

Estimation does not have to be exact, it’s about being close

Fun Trick! 🎉

Use friendly numbers (10, 20, 50, 100…) for easier multiplication.
Example: 52 × 19 ≈ 50 × 20 = 1000

Learn with an example

Let’s practice!🖊️