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Addition and Subtraction (Medium)

Test your addition and subtraction skills with this 11 Plus Maths quiz. Learn to handle bigger numbers and spot clever shortcuts to solve questions faster.

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Fascinating Fact:

If you added Big Ben at 96 metres and the Statue of Liberty at 93 metres, you would get 189 metres, still shorter than the Eiffel Tower by 141 metres.

In 11 Plus Maths, pupils use addition and subtraction to solve more advanced number problems. Practising mental maths helps with time management and accuracy in exam conditions.

Key Terms

Regrouping: Rearranging numbers to make adding or subtracting easier, such as carrying or borrowing.
Inverse: An operation that undoes another, like subtraction undoing addition.
Sum: The result of adding two or more numbers together.

Find out what subjects are tested in the 11 Plus in our Guide to 11 Plus Subjects .

Frequently Asked Questions (Click to see answers)

How can I get better at mental maths?

Practise adding and subtracting in your head every day. Try using number pairs and round numbers to estimate quickly before checking the exact answer.

Why is subtraction called the inverse of addition?

Because subtraction reverses what addition does. If 7 + 3 = 10, then 10 ? 3 = 7 — the operations undo each other.

Are addition and subtraction important for algebra?

Yes, these operations form the basis of algebra. Understanding how numbers relate helps pupils solve equations and rearrange expressions later on.

Try These Related Quizzes

In each of the following questions, what is the answer to the given problem?

1 .

123 + 56 + 684 - 3 = ?

870

880

860

890

TIP: With numbers less than 1,000, add the hundreds first, then the tens and then the ones. 123 + 56 + 684 - 3 = (100 + 600) + (20 + 50 + 80) + (3 + 6 + 4 - 3) = 700 + 150 + 10 = 860. You can repeat the procedure if you are having difficulty in doing it in your head

2 .

345 + 450 - 200 = ?

597

598

596

595

345 + 450 - 200 = (300 + 400 - 200) + (40 + 50) + (5) = 500 + 90 + 5 = 595

3 .

245 + 309 - 68 = ?

486

485

487

488

245 + 309 - 68 = (200 + 300) + (40 - 60) + (5 + 9 - 8) = 500 - 20 + 6 = 486

4 .

234 - 450 + 389 = ?

170

174

175

173

234 - 450 + 389 = (200 - 400 + 300) + (30 - 50 + 80) + (4 + 9) = 100 + 60 + 13 = 173

5 .

500 + 200 + 400 - 678 = ?

420

421

422

423

500 + 200 + 400 - 678 = (500 + 200 + 400 - 600) - (70) - (8) = 500 - 78 = 422. You can repeat the procedure if you are having difficulty in doing it in your head. Note: with negative numbers, the negative sign is kept with each part of the number, e.g. - 678 is written as -600, -70, -8

6 .

238 - 78 - 45 + 167 = ?

228

282

283

284

238 - 78 - 45 + 167 = (200 + 100) + (30 - 70 - 40 + 60) + (8 - 8 - 5 + 7) = 300 - 20 + 2 = 282

7 .

400 - 389 - 400 + 567 = ?

177

178

180

176

400 - 389 - 400 + 567 = (500 - 300) + (60 - 80) + (7 - 9) = 200 - 20 - 2 = 178

8 .

789 + 567 - 968 = ?

388

389

390

387

789 + 567 - 968 = (700 + 500 - 900) + (80 + 60 - 60) + (9 + 7 - 8) = 300 + 80 + 8 = 388

9 .

234 - 68 + 2 + 13 = ?

180

182

181

183

234 - 68 + 2 + 13 = (200) + (30 - 60 + 10) + (4 + 2 + 3 - 8) = 200 - 20 + 1 = 181

10 .

400 + 323 - 23 = ?

703

697

700

723

400 + 323 - 23 = (400 + 300) + (20 - 20) + (3 - 3) = 700. Be on the LOOKOUT FOR SHORT CUTS: 323 - 23 = 300

Author: Frank Evans (Specialist 11 Plus Teacher and Tutor)

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