Mentally Adding and Subtracting 10 and 100

What is 100 more than 430?

• 530

• 330

• 500

• 400

Tags

CCSS.2.NBT.B.8

What is 100 more than 632?

• 732

• 600

• 532

• 700

Tags

CCSS.2.NBT.B.8

What is 100 more than 745?

• 845

• 645

• 700

• 800

Tags

CCSS.2.NBT.B.8

What is 100 more than 512?

• 412

• 612

• 500

• 600

Tags

CCSS.2.NBT.B.8

What is 
100 more than
321?

• 450

• 421

• 221

• 320

Tags

CCSS.2.NBT.B.8

when estimating, numbers that make it easier to add or subtract mentally

• compatible numbers

• midpoint

• midpoint

• interval

David made a pattern to show how to mentally subtract 10. Select the number pattern that could be David’s pattern. Make sure to look at the COMPLETE pattern - all 5 numbers.

• 760, 750, 740, 730, 740

• 760, 750, 730, 740, 730

• 760, 750, 740, 730, 720

• 760, 750, 740, 730, 729

Tags

CCSS.3.OA.D.9

• 
• 
• 
• 

Tags

CCSS.2.NBT.B.7

Jamal write a number that is 100 less than 459. Which number is 100 less than 459?

• 359

• 449

• 559

• 469

Tags

CCSS.2.NBT.B.8