Rounding to add and subtract

Estimate this sum: 56+43

• 99

• 100

• 90

• 110

Tags

CCSS.3.NBT.A.2

CCSS.3.OA.D.8

When you see the word ABOUT in math, you know to . . . ?

• add

• subtract

• estimate

• guess

Tags

CCSS.3.OA.D.8

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

• 110
• 100
• 111
• 90

Tags

CCSS.3.NBT.A.1

CCSS.3.OA.D.8

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

• 120
• 150
• 140
• 136

Tags

CCSS.3.NBT.A.1

CCSS.3.NBT.A.2

CCSS.3.OA.D.8

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

• 100
• 200
• 0
• 300

Tags

CCSS.3.NBT.A.1

CCSS.3.OA.D.8

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

• 700
• 600
• 758
• 800

Tags

CCSS.3.NBT.A.1

CCSS.3.NBT.A.2

CCSS.3.OA.D.8

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

• 300
• 100
• 181
• 200

Tags

CCSS.3.NBT.A.1

CCSS.3.OA.D.8

What is the best estimate of 123 + 143 to the nearest 10?

• 150

• 260

• 270

• 180

Tags

CCSS.3.NBT.A.1

Sum means to __________.

• Add

• Subtract

• Multiply

• Divide

Tags

CCSS.3.NBT.A.2

Difference means to _________.

• Add

• Subtract

• Multiply

• Divide

Tags

CCSS.3.NBT.A.2