TalentJR apps
Often you only need to know roughly how big an answer is — to check a bill or pick an option in a test. Round each number to the nearest ten (or hundred), multiply the easy numbers, and choose the option closest to that.
✓ You passed this lesson’s test.
Round and multiply — “round each number to an easy one and multiply those”
Use it for: Checking that a calculator answer makes sense, shopping, and multiple-choice questions.
Check: 61 × 29 = 1769, and 1800 is the closest option ✓
Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
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 30 s.
🏅 Sign in with Google to earn the 🦅 Estimate Eagle badge when you pass — and a certificate when you finish all 5 lessons of Part 3 · Speed dividing, percentages and checking. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
Sign in with Google to ask Free — 20 questions a day.
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India and visit homes in selected cities. Tell us what you need and our team will call you with timings and fees.