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3rd grade

Course: 3rd grade > Unit 3

Lesson 3: Strategies for adding two and three-digit numbers

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Select strategies for adding within 1000

CCSS.Math: 2.NBT.B.7, 3.NBT.A.2

Google Classroom

Denzel wants to solve 115, plus, 497.

So he adds 115, plus, 500, then subtracts 3, to solve in his head.

Is Denzel's result equal to 115, plus, 497?

(Choice A)
Yes, 115, plus, 497, equals, 115, plus, 500, minus, 3.
(Choice B)
No, 115, plus, 497, is greater than, 115, plus, 500, minus, 3.
(Choice C)
No, 115, plus, 497, is less than, 115, plus, 500, minus, 3.

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