Adding and Subtracting: Master Mental and Written Methods

Question 1

Find the difference between 456 and 289.

Accepted Answer

167

Answer

157

Answer

176

Answer

186

Question 2

Which method is most appropriate for solving 765 - 342?

Accepted Answer

Column subtraction

Answer

Expanded subtraction

Answer

Mental subtraction

Answer

Estimation

Question 3

The perimeter of a rectangular garden is the distance around the outside. A rectangular garden has a length of 15 metres and a width of 12 metres. What is the perimeter of the garden?

Accepted Answer

54 metres

Answer

27 metres

Answer

30 metres

Question 4

Which of the following is **not** a mental method for adding two-digit numbers?

Accepted Answer

Subtracting one of the numbers

Answer

Splitting the numbers into tens and ones

Answer

Using a number line

Answer

Counting on from one number to the next

Question 5

Which of the following is **not** a written method for subtracting three-digit numbers?

Accepted Answer

Mental subtraction

Answer

Vertical subtraction

Answer

Subtraction by decomposition

Answer

Counting back

Question 6

Subtract 457 from 876 using the column method.

Accepted Answer

429

Answer

419

Answer

439

Question 7

Which of these is NOT a good way to estimate the sum of 456 and 234?

Accepted Answer

Adding the two numbers without rounding

Answer

Rounding both numbers to the nearest ten

Answer

Rounding both numbers to the nearest hundred

Question 8

Solve: 2y - 150 = 300

Accepted Answer

225

Answer

150

Answer

300

Question 9

Which of these is NOT a strategy for doing calculations in your head?

Accepted Answer

Long division

Answer

Compensation

Answer

Friendly numbers

Answer

Chunking

Question 10

What is the distance all around this square?

Accepted Answer

18 cm

Answer

12 cm

Answer

24 cm

Answer

30 cm

Question 11

Which number sentence correctly represents the calculation 789 + 345?

Accepted Answer

345 + 789

Answer

789 - 345

Answer

789 x 345

Answer

345 - 789

Question 12

Which of the following calculations results in a sum greater than 1000?

Accepted Answer

678 + 456

Answer

345 + 234

Answer

789 - 456

Answer

567 - 234

Question 13

Use a written method to find the sum of 456, 347, and 298.

Accepted Answer

1101

Answer

1001

Answer

1201

Answer

1301

Question 14

A farmer has 123 sheep and buys 456 more. How many sheep does he have in total?

Accepted Answer

579

Answer

569

Answer

589

Answer

559

Question 15

Use mental addition to calculate 456 + 234 by adding the hundreds, tens, and ones separately.

Accepted Answer

690

Answer

680

Answer

700

Answer

670

Question 16

Subtract 654 from 987 using expanded form. Express the numbers as hundreds, tens, and ones before subtracting.

Accepted Answer

333

Answer

323

Answer

343

Question 17

Which of the following is NOT a benefit of using mental methods for addition and subtraction?

Accepted Answer

Improved accuracy

Answer

Enhanced problem-solving skills

Answer

Reduced reliance on written methods

Answer

Faster calculations

Question 18

Which strategy would be most useful for mentally subtracting 45 from 123?

Accepted Answer

Compensation

Answer

Partitioning

Answer

Expanded form

Answer

Rounding

Question 19

A store has 567 apples in stock. They receive a delivery of 234 apples and then sell 150 apples. How many apples do they have left?

Accepted Answer

651

Answer

631

Answer

661

Answer

641

Question 20

A bakery sold 234 cakes on Monday and 357 cakes on Tuesday. How many cakes did they sell in total?

Accepted Answer

591

Answer

691

Answer

491

Answer

581

Question 21

What is the difference between 675 and 289?

Accepted Answer

386

Answer

486

Answer

286

Question 22

A shop had 450 apples. They sold 125 apples. How many apples are left?

Accepted Answer

325

Answer

225

Answer

575

Answer

425

Question 23

What is 345 + 287?

Accepted Answer

632

Answer

542

Answer

642

Answer

532

Question 24

A farmer harvested 785 carrots and 329 potatoes. How many more carrots did he harvest than potatoes?

Accepted Answer

456

Answer

556

Answer

446

Answer

356

Question 25

What is the sum of 127, 456, and 389?

Accepted Answer

972

Answer

1072

Answer

872

Answer

982

Question 26

Subtract 254 from 837.

Accepted Answer

583

Answer

573

Answer

683

Answer

483

Question 27

A school organized a fundraiser. They raised £2,345 from selling cookies and £1,789 from selling cakes. How much money did they raise in total?

Accepted Answer

£4,134

Answer

£3,234

Answer

£4,234

Answer

£3,134

Question 28

A train journey takes 3 hours and 15 minutes. If the journey started at 10:45 am, what time will the train arrive?

Accepted Answer

2:00 pm

Answer

1:00 pm

Answer

1:45 pm

Answer

2:15 pm

Question 29

A store had 956 toys. They sold 387 toys. How many toys are left?

Accepted Answer

569

Answer

469

Answer

559

Answer

669