Adding and Subtracting Three-Digit Numbers: Master the Basics

Question 1

Which of the following is the largest three-digit number?

Accepted Answer

678

Answer

345

Answer

456

Answer

567

Question 2

Which of the following is a rounded estimate of 285 added to 167?

Accepted Answer

450

Answer

400

Answer

500

Answer

550

Question 3

Which of the following calculations shows that addition is commutative?

Accepted Answer

123 plus 456 is the same as 456 plus 123

Answer

123 minus 456 is the same as 456 minus 123

Answer

123 multiplied by 456 is the same as 456 multiplied by 123

Answer

123 divided by 456 is the same as 456 divided by 123

Question 4

Calculate the sum of 245 and 167.

Accepted Answer

412

Answer

392

Answer

402

Answer

382

Question 5

Calculate the total: 345 + 256 - 189

Accepted Answer

402

Answer

412

Answer

512

Answer

502

Question 6

What equation shows the difference between 456 and 123?

Accepted Answer

456 - 123 = 333

Answer

456 + 123 = 333

Answer

123 - 456 = 333

Answer

123 + 456 = 333

Question 7

Find the total of 123, 234, and 345?

Accepted Answer

702

Answer

692

Answer

712

Answer

722

Question 8

Which method is most suitable for adding 345 and 276? (Year 4, United Kingdom)

Accepted Answer

Column addition

Answer

Expanded form

Answer

Bridging

Answer

Subtraction

Question 9

A farmer has 325 apples. He sells 147 apples at the market. How many apples does he have left? (Year 4, United Kingdom)

Accepted Answer

178

Answer

181

Answer

472

Answer

468

Question 10

Calculate the sum of 234, 456, and 175 using column addition. (Year 4, United Kingdom)

Accepted Answer

965

Answer

765

Answer

865

Answer

1065

Question 11

Which written algorithm is used to add three-digit numbers?

Accepted Answer

Column addition

Answer

Short multiplication

Answer

Long division

Answer

Number line method

Question 12

When you've finished a subtraction problem, how can you check your answer?

Accepted Answer

Adding the difference to the smaller number

Answer

Rounding up the numbers

Answer

Multiplying the two numbers together

Answer

Dividing the two numbers

Question 13

When adding three-digit numbers, what's NOT a good way to do it?

Accepted Answer

Rounding the numbers to the nearest ten

Answer

Splitting the numbers into their expanded forms

Answer

Using a vertical algorithm

Answer

Changing numbers around to make them easier to add

Question 14

Here's a tricky one! 456 minus 321. What's the difference?

Accepted Answer

135

Answer

125

Answer

145

Answer

155

Question 15

If we have a number 789 and take away 345, what is the difference?

Accepted Answer

444

Answer

344

Answer

354

Answer

434

Question 16

Select the correct steps for adding 245 and 367 using the column method.

Accepted Answer

2 4 5
+3 6 7
----
6 1 2

Answer

245
+367
----
612

Answer

542
+673
----
1215

Answer

562
+673
----
1235

Question 17

Which of the following correctly shows the number sentence 157 + 243 regrouped into tens and ones?

Accepted Answer

157 + 243 = (100 + 50 + 7) + (200 + 40 + 3)

Answer

157 + 243 = (100 + 40 + 7) + (200 + 50 + 3)

Answer

157 + 243 = (100 + 50 + 7) + (100 + 40 + 43)

Answer

157 + 243 = (200 + 50 + 7) + (100 + 40 + 3)

Question 18

Which of these is NOT a strategy that can be used to add three-digit numbers?

Accepted Answer

Multiplication

Answer

Column method

Answer

Expanded form

Answer

Rounding

Question 19

What is the total when you add 234 and 197?

Accepted Answer

431

Answer

331

Answer

421

Answer

531

Question 20

What is the difference between 567 and 248?

Accepted Answer

319

Answer

219

Answer

519

Answer

419

Question 21

A shop has 156 apples. They sell 79 apples in the morning and 45 in the afternoon. How many apples are left?

Accepted Answer

32

Answer

22

Answer

42

Answer

52

Question 22

Which number is one hundred more than 345?

Accepted Answer

445

Answer

345

Answer

245

Question 23

Which number is fifty less than 678?

Accepted Answer

628

Answer

428

Answer

728

Answer

528

Question 24

There are 364 students in Year 4. If 125 are boys, how many are girls?

Accepted Answer

239

Answer

139

Answer

339

Answer

439

Question 25

Apples cost 25p each. If I buy 12 apples, how much will I pay?

Accepted Answer

£3

Answer

£4

Answer

£2

Question 26

A car park has 145 spaces. If 78 cars leave, how many spaces are left empty?

Accepted Answer

67

Answer

57

Answer

77

Answer

87

Question 27

What is the answer to 145 + 234 - 123?

Accepted Answer

256

Answer

156

Answer

356

Answer

246

Question 28

What is the difference between 456 and 234?

Accepted Answer

222

Answer

212

Answer

242

Answer

232

Question 29

Which calculation is different from the others?

Accepted Answer

25 + 45

Answer

123 - 45

Answer

345 - 123

Answer

345 + 123

Question 30

A farmer has 254 sheep and buys 126 more. How many sheep does he have in total?

Accepted Answer

380

Answer

480

Answer

180

Answer

280

Question 31

Which of the following is NOT a method for adding three-digit numbers?

Accepted Answer

Multiplying the numbers

Answer

Column addition

Answer

Expanded form

Answer

Place value

Question 32

When subtracting three-digit numbers, what is the first step?

Accepted Answer

Line up the digits vertically

Answer

Regroup if necessary

Answer

Estimate the answer

Answer

Subtract the largest digit from the smallest

Question 33

What is the importance of regrouping when adding three-digit numbers?

Accepted Answer

It ensures the accuracy of the sum.

Answer

It helps to visualize the place values

Answer

It makes the addition process faster

Answer

It avoids the need for borrowing

Question 34

Which of the following is a strategy for estimating the sum of two three-digit numbers?

Accepted Answer

Round the numbers to the nearest ten.

Answer

Multiply the smallest digit by the largest

Answer

Add the digits in the ones place only

Question 35

What is the relationship between adding and subtracting three-digit numbers?

Accepted Answer

Subtracting is the inverse operation of adding.

Answer

The order of the numbers does not matter in both operations

Answer

Subtracting involves borrowing while adding does not

Answer

Adding is always easier than subtracting

Question 36

A baker made 235 cupcakes in the morning and 187 in the afternoon. How many cupcakes did the baker make in total?

Accepted Answer

422

Answer

412

Answer

322

Question 37

There are 345 people at a concert. 128 of them leave. How many people are left at the concert?

Accepted Answer

217

Answer

227

Answer

473

Answer

117

Question 38

What is the sum of 156 and 274?

Accepted Answer

430

Answer

330

Answer

420

Answer

530

Question 39

What is the difference between 523 and 189?

Accepted Answer

334

Answer

324

Answer

434

Answer

234

Question 40

A shop has 412 balloons. They sell 153 balloons. How many balloons are left?

Accepted Answer

259

Answer

565

Answer

269

Answer

359

Question 41

Sarah has 285 marbles. Her friend gives her 176 more. How many marbles does Sarah have now?

Accepted Answer

461

Answer

451

Answer

561

Answer

361

Question 42

Which number is 100 less than 742?

Accepted Answer

642

Answer

542

Answer

632

Answer

842

Question 43

A farmer harvested 327 apples and 295 oranges. How many more apples than oranges did he harvest?

Accepted Answer

32

Answer

42

Answer

132

Answer

22

Question 44

What is the missing number in the equation: 258 + ___ = 531?

Accepted Answer

273

Answer

263

Answer

373

Question 45

A library had 675 books. After some were borrowed, there were 498 books left. How many books were borrowed?

Accepted Answer

177

Answer

277

Answer

167

Answer

267

Question 46

Find the sum of 234 and 156.

Accepted Answer

390

Answer

370

Answer

290

Answer

490

Question 47

Subtract 125 from 368.

Accepted Answer

243

Answer

343

Answer

233

Answer

143

Question 48

A farmer has 245 sheep. He sells 112 of them. How many sheep does he have left?

Accepted Answer

133

Answer

357

Answer

123

Answer

233

Question 49

Which of the following is equal to 456 - 234?

Accepted Answer

222

Answer

122

Answer

422

Answer

322

Question 50

Find the sum of 123, 234, and 345.

Accepted Answer

702

Answer

802

Answer

602

Question 51

A shopkeeper has 356 apples. He sells 147 apples on Monday and 123 apples on Tuesday. How many apples does he have left?

Accepted Answer

86

Answer

66

Answer

76

Answer

96

Question 52

Which of the following is NOT a valid strategy for adding three-digit numbers?

Accepted Answer

Adding the digits from left to right

Answer

Using a number line

Answer

Estimating the answer first

Answer

Using the expanded form

Question 53

Find the difference between 567 and 345.

Accepted Answer

222

Answer

122

Answer

422

Answer

322

Question 54

A school has 456 students. 123 new students join the school in September. How many students are there in the school now?

Accepted Answer

579

Answer

379

Answer

679

Answer

479

Question 55

Which of the following representations shows the number 234?

Accepted Answer

Two hundreds, three tens, and four ones

Answer

Three hundreds, two tens, and four ones

Answer

Two hundreds, four tens, and three ones

Answer

Four hundreds, two tens, and three ones