Addition/Subtraction/Estimation Review

Subtraction is

• starting with the sum

• starting with how much you will take away

• starting with what is left

• starting with the total

Tags

CCSS.2.OA.A.1

Find the sum:  $17+4=$  

• 16

• 32

• 21

• 9

Tags

CCSS.1.OA.A.1

 $509+134=$  

• 643

• 608

• 618

• 708

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Bobby has 44 toy cars and trucks. He also has 62 ninja turtles and soldiers. Estimate how many toy cars, trucks, ninja turtles and soldiers Bobby has.

• 86
• 10
• 100

 $437-37=$  

Find the difference:

• 474

• 23

• 400

• 467

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

 $664+223=$  

What is the sum?

• 887

• 886

• 441

• 431

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

The top number in a subtraction problem MUST be the

• smallest number

• the largest number

• what is left

• how much more

Tags

CCSS.1.OA.A.1

 $708-456=$  

• 352

• 242

• 252

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Estimating is to....

• find the exact answer

• find something close to the correct answer

• use an algorithm

 $400-165=$  

• 365

• 345

• 235

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2