Estimating Sums and Differences

Estimate the sum of 37+91 by rounding to the nearest tens

• 120

• 150

• 130

• 140

Tags

CCSS.3.NBT.A.1

CCSS.3.NBT.A.2

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.4.NBT.B.4

CCSS.5.NBT.B.7

Round to the nearest ten to estimate the difference.
61 - 23 = 

• 40
• 80
• 30
• 90

Tags

CCSS.3.NBT.A.1

CCSS.3.OA.D.8

Round to the nearest ten to estimate the sum.
73 + 48 = 

• 20
• 30
• 110
• 120

Tags

CCSS.3.NBT.A.1

CCSS.3.NBT.A.2

CCSS.3.OA.D.8

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

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

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

Tags

CCSS.2.NBT.B.5

• 400 + 100 = 500
• 400 + 200 = 600
• 400 + 200 = 500
• 300 + 100 = 400

Tags

CCSS.3.NBT.A.2

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

Tags

CCSS.2.NBT.B.7

• 300 - 100 = 400
• 200 - 100 = 100
• 300 - 100 = 200
• 300 + 100 = 400

Tags

CCSS.2.NBT.B.8

• 700 - 200 = 500
• 800 - 200 = 600
• 800 - 300 = 500
• 700 - 200 = 500

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7