Multidigit Adding and Subtraction

Amy rode her bike last weekend. Which is the best estimate of the total number of miles she rode her bike?

• 80 miles

• 60 miles

• 70 miles

• 90 miles

Which one of these phrases gives you a clue that you're about to add?

• How much more does Timmy have than Bobby?

• Timmy and Bobby will equally share...

• Bobby and Timmy have "x" time the amount?

• How much does Timmy and Bobby have combined?

Tags

CCSS.1.OA.A.1

Q1. What is the result of 78 + 10?

• A) 78

• B) 68

• C) 88

• D) 188

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

• 289
• 389
• 189
• 298

Tags

CCSS.6.NS.B.3

279

• 279

• 179

• 79

• 197

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

379 561 479 473

• 379

• 561

• 479

• 473

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

304 - 53

• 251

• 250

• 151

• 357

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

52-13=

• 41

• 31

• 39

• 49

Tags

CCSS.2.OA.A.1

154  -  72  =

• 76

• 82

• 31

• 226

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Compatible numbers for addition and subtraction are numbers that do what?  Numbers that equal tens or hundreds are the most common examples. 

• Easily combine to equal benchmark numbers

• Combine to equal benchmark numbers but with more difficulty

• Do not really exist

Tags

CCSS.2.NBT.B.5