Mental Math Mastery Quiz

What is the sum of 345 and 278 using mental math strategies?

• 613

• 623

• 633

• 653

Tags

ONTARIO.MATH.3.B2.3

If you have 500 apples and you give away 123, how many apples do you have left?

• 377

• 387

• 397

• 407

Tags

ONTARIO.MATH.3.B2.5

Using estimation, what is the approximate sum of 456 and 289?

• 700

• 750

• 800

• 850

Tags

ONTARIO.MATH.3.B2.3

Solve the following using an algorithm: 678 - 234.

• 444

• 454

• 444

• 464

Tags

ONTARIO.MATH.3.B2.4

What is 123 + 456 using mental math?

• 579

• 589

• 599

• 609

Tags

ONTARIO.MATH.3.B2.3

If you start with 800 and subtract 345, what is the result?

• 455

• 465

• 475

• 485

Tags

ONTARIO.MATH.3.B2.5

Estimate the difference between 900 and 456.

• 400

• 450

• 500

• 550

Tags

ONTARIO.MATH.3.B2.3

Using an algorithm, find the sum of 234 and 567.

• 791

• 801

• 811

• 821

Tags

ONTARIO.MATH.3.B2.4

What is the result of 789 - 123 using mental math?

• 656

• 666

• 676

• 686

Tags

ONTARIO.MATH.3.B2.3

If you have 1000 candies and you eat 345, how many candies are left?

• 645

• 655

• 665

• 675

Tags

ONTARIO.MATH.3.B2.5