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How Can You Use To Estimate The Sum For 2-3 A Digit Addition

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Solve addition sentences using place value and solve subtraction sentence using place value.

Addition and subtraction are inverse operations. Both operations can be solved using many common and similar strategies. Also, knowing strategies in one operation can help create solution opportunities for the other.

Math Vocabulary:
Add, addition, amount left over, difference, equals, equation, estimate, number sentence, subtraction, word problem, count back, count on, digit, number line, ones place, place-value strategy, strategy, tens place, hundreds place, pan balance, pattern, compensation strategy sum, number sentence, inverse operations, operations, solution, total, word problem, base-10 blocks, is the same as, trade
Understandings:
Solve …show more content…
NBT.2
Essential Questions:

What strategies can you use to estimate the sum for 2-3 a digit addition sentence?

How can you use the compensation strategy to mentally solve multi-digit addition problems?

How can you use number lines to solve 2-3 digit addition problems?

How to use place value to solve 2-3 digit addition problems?

What strategies can you use to estimate the sum for 2-3 a digit subtraction sentence?

How can you use the count back/count on strategy to solve 2-3 digit subtraction problems?

How are addition and subtraction operations connected?
Students will know . . . strategies for estimating the sum of 2-3 digit addition sentences

how to use the compensation strategy to solve multi digit addition problems

how to use the number line to solve 2-3 digit addition sentences

how to use place value to solve 2-3 digit addition sentences

. Students will be able to…

use strategies for estimating the sum of 2-3 digit addition problems

use the compensation strategy to solve multi-digit addition problems

use the number line to solve 2-3 digit addition sentences

use place value to solve 2-3 digit addition sentence

use strategies to estimate the sum of 2-3 digit subtraction

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