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Addition and Subtraction 3 (Medium)

Sharpen your addition and subtraction skills with this 11 Plus Maths quiz. Solve exciting challenges that mix numbers, patterns, and logic for real exam-style practice.

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Fascinating Fact:

If you add the height of the Great Pyramid of Giza at 139 metres and the Statue of Liberty at 93 metres, the total is 232 metres, about two London Eyes stacked together.

In 11 Plus Maths, pupils practise solving calculations quickly and accurately. Understanding how numbers relate helps build confidence for harder subjects such as fractions and algebra.

  • Estimate: A quick, sensible guess of an answer to check if your calculation is correct.
  • Rounding: Reducing a number to the nearest ten, hundred, or thousand for easier calculation.
  • Sum: The total you get after adding numbers together.
Why is estimation useful in maths?

Estimation helps you check if an answer is reasonable. It saves time and is especially helpful when doing mental maths or checking large calculations.

What are some tips for faster addition and subtraction?

Look for patterns, group numbers that make tens, and use rounding to simplify steps before adjusting the final total.

How can addition and subtraction help with fractions?

They form the foundation for adding or subtracting fractions with the same or different denominators, which is essential in higher-level maths.

1 .
926 + 220 - 403 = ?
743
703
783
683
With numbers less than 1,000, add the hundreds first, then the tens and then the ones.
926 + 220 - 403 = (900 + 200 - 400) + (20 + 20 - 0) + (6 + 0 - 3) = (700) + (40) + (3) = 743
You can ignore the zeros
2 .
690 + 426 - 888 = ?
218
228
238
248
A quick way to add 690 is to add 700 then subtract 10.
Here’s the other way to solve the problem, by adding the hundreds first, then the tens and then the ones:
690 + 426 - 888 = (600 + 400 - 800) + (90 + 20 - 80) + (0 + 6 - 8) = 200 + 30 + -2 = 228
3 .
600 + 300 + 400 - 678 = ?
626
624
622
620
600 + 400 = 1,000. Keep your eyes peeled, looking for ways to break the problem up into smaller sums
4 .
894 - 183 - 500 + 17 = ?
208
216
211
228
Remember, 100s first, then 10s, then ones:
894 - 183 - 500 + 17 = (800 - 500 - 100) + (90 + 10 - 80 - 0) + (4 + 7 - 3 - 0) = 200 + 20 + 8 = 228
5 .
53 - 467 + 643 = ?
229
228
227
226
To avoid working with negative numbers, you can rearrange the problem:
53 - 467 + 643 = (53 + 643) - 467 = 696 - 467 = 229
6 .
620 + 123 - 83 = ?
663
660
657
654
In multiple choice questions, the last digit in the answers can help you find the correct answer more quickly. 0 + 3 - 3 = 0 so you know the correct answer will end with a zero. Be on the LOOKOUT FOR SHORT CUTS like this
7 .
420 - 403 - 100 + 349 = ?
246
256
266
276
Always look out for shortcuts: the 400s in 420 – 403 cancel each other out, making the answer the same as 20 - 3
8 .
751 + 226 - 805 = ?
162
77
177
172
Remember: in multiple choice quizzes, the last digit in a number can show you the right answer. 1 + 6 - 5 = 2, so the last digit in the correct answer will also be a 2
9 .
353 - 28 + 11 + 27 = ?
362
363
364
365
It's a good idea to add the hundreds first, then the tens and finally the ones:
353 - 28 + 11 + 27 = (300) + (50 + 10 + 20 - 20) + (3 + 1 + 7 - 8) = 300 + 60 + 3 = 363
10 .
909 + 76 - 654 - 13 = ?
318
320
322
324
TIP: With numbers less than 1,000, add the hundreds first, then the tens and then the ones.
909 + 76 - 654 - 13 = (900 - 600) + (0 + 70 - 50 - 10) + (9 + 6 - 4 - 3) = 300 + 10 + 8 = 318
You can repeat the procedure if you are having difficulty in doing it in your head
Author:  Frank Evans (Specialist 11 Plus Teacher and Tutor)

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