Fluency in Adding and Subtracting 10 and 100

What happens to the ones place when you add or subtract 10 from a number?

• It resets to 0

• It decreases by 1

• It stays the same

• It increases by 1

If you have the number 423 and subtract 10, what is the new number?

• 433

• 413

• 403

• 423

What is 10 more than 637?

• 657

• 647

• 637

• 627

If you subtract 10 from 152, what is the result?

• 162

• 132

• 152

• 142

When adding 10 to 394, why do we need to regroup?

• No regrouping is needed

• The hundreds place decreases

• The ones place changes

• The tens place exceeds 9

What does the tens place become when you add 10 to 394?

• 0

• 9

• 10

• 1

If the number is 423 and you add 100, what is the new number?

• 323

• 623

• 423

• 523

What is the result of subtracting 100 from 637?

• 837

• 637

• 737

• 537

If you add 100 to 394, what number do you get?

• 694

• 394

• 494

• 594

What is 100 less than 152?

• 252

• 52

• 50

• 152