Mental Math Estimate Sums and Differences

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

• 120
• 150
• 140
• 136

Estimate the sum of 52+59 by rounding to the nearest tens

• 110
• 100
• 111
• 90

Estimate the sum of 120+190 by rounding to the nearest hundreds

• 100
• 200
• 0
• 300

Estimate the sum of 327+431 by rounding to the nearest hundreds

• 700
• 600
• 758
• 800

Estimate the difference of 470-289 by rounding to the nearest hundreds

• 300
• 100
• 181
• 200

Estimate the difference of 7,900-2,999 by rounding to the nearest thousands

• 6,000
• 4,000
• 5,000
• 3,000

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

There was 926 people at basketball tournament. 607 people left before noon. Which is the best estimate of the number of people who stayed?

• 150
• 250
• 300
• 500

What is 354 rounded to the nearest ten?

• 360

• 300

• 400

• 350

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

What is 4,518 rounded to the nearest thousand?

• 4,500

• 4,520

• 4,000

• 5,000

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3