The worksheets themselves are in German – just as in class. The editor is only available in German so far.
Estimating – worksheets to print
First estimate with rounded numbers, then calculate exactly – or use the estimate to see which answer can be right.
- Choose the number of tasks and the difficulty yourself
- With an answer sheet and, if you like, a QR code to the answers
- At three levels (★ to ★★★) and as group A and B
- As a single worksheet or as a task on a mixed worksheet
Estimating: explained simply
An estimate quickly gives the approximate size of an answer. Use it to decide whether an exact answer is plausible.
How to work it out
- Replace the numbers with nearby numbers that are easy to calculate with.
- Calculate approximately and later compare with the exact answer. For division, choose numbers that divide easily.
An example, step by step
398 + 203: estimate first, then calculate exactly.
- Round to easy numbers: 398 ≈ 400 and 203 ≈ 200.
- Estimate: 400 + 200 = 600.
- Exact answer: 398 + 203 = 601. This is close to 600 and fits the estimate.
Understand other variations
Choose an answer
If the choices for 398 + 203 are 61, 601 and 6,001, only 601 is close to the estimated 600.
Multiplication and division
47 · 6 ≈ 50 · 6 = 300. With larger numbers, round both factors, for example 386 · 42 ≈ 400 · 40 = 16,000. For division, use compatible numbers: 2,772 : 36 ≈ 2,800 : 40 = 70.
Your turn
Estimate 198 + 304.
Show the answer and method
For example, 200 + 300 = 500. The exact answer is 502.
Ready-made worksheets: Estimating
Click the picture to see the worksheet large and print it. “Use” opens it in the editor.