Estimating Sums and Differences

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

Tags

CCSS.4.NBT.A.3

CCSS.4.NBT.B.4

CCSS.4.OA.A.3

If you have 382, you might say you have ABOUT...

• 400
• 390
• 450
• 350

Tags

CCSS.3.NBT.A.1

If you have 819, you might say you have approximately...

• 900
• 880
• 820
• 810

Tags

CCSS.3.NBT.A.1

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

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CCSS.3.NBT.A.2

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

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CCSS.3.NBT.A.2

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

Tags

CCSS.3.NBT.A.2

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

Tags

CCSS.3.NBT.A.2

• 500 + 100 = 600
• 500 - 100 = 400
• 600 + 100 = 700
• 600 + 200 = 800

Tags

CCSS.3.NBT.A.2

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

Tags

CCSS.3.NBT.A.2

• 900 - 300 = 600
• 900 - 200 = 700
• 1,000 - 200 = 800
• 900 + 300 = 1,200

Tags

CCSS.3.NBT.A.2