Estimating Sums & Differences

• 500 - 200 = 300
• 600 - 200 = 300
• 600 - 200 = 400
• 500 - 200 = 200

Tags

CCSS.2.NBT.B.8

There are 324 kids at The Green School and 399 kids at The Blue School. Estimate how many kids there are in total to the nearest hundred.

• 640

• 700

• 345

• 900

Round to the nearest hundred, then estimate the sum:

123 + 456

• 580

• 600

• 650

• 500

Tracy ordered 325 pet toys and 165 bags of dog food for her new pet store. Which is the best estimate of the total number of items Tracy ordered?

• 400
• 500
• 600
• 700

• 400 + 200 = 600
• 500 + 200 = 700
• 500 - 200 = 400
• 500 - 200 = 300

Tags

CCSS.2.NBT.B.7

Estimate the sum of 37+99 by rounding to the nearest tens

• 120
• 150
• 140
• 136

To celebrate Halloween a family is counting pumpkin seeds. Max and his dad counted 243; Brita and her mom counted 333. To the nearest ten, about how many more seeds did Brita and her mom count?

• 85

• 90

• 100

• 500

 $Estimate\ to\ the\ tens\ place.\ \$   $488\ -\ 351\ =\$  

• 140

• 160

• 130

• 200

• 400 + 200 = 600
• 500 + 200 = 600
• 500 + 200 = 700
• 400 + 200 = 700

Tags

CCSS.2.NBT.B.5

237 fifth graders and 346 fourth graders went on a field trip. Estimate how many more fourth graders were on a field trip than fifth graders.

• 200 more
• 109 more
• 100 more
• 110 more