What is the minimum sum possible when adding two two-digit numbers?

The minimum sum is 20 (10 + 10).

How do you carry over in addition when the sum exceeds 9?

You write down the rightmost digit and carry over the left digit to the next column.

What is the importance of place value in two-digit addition?

Place value helps in aligning numbers correctly and understanding the value of each digit.

What is a common strategy for adding two-digit numbers?

Break the numbers into tens and ones, add the tens, then add the ones.

What is the associative property of addition?

The associative property states that the way in which numbers are grouped in addition does not change the sum.

What is the commutative property of addition?

The commutative property states that changing the order of the addends does not change the sum.

How can estimation be used in two-digit addition?

Estimation can be used by rounding numbers to the nearest ten to quickly assess the sum.

What is a two-digit number?

A two-digit number is any number from 10 to 99.

...

Two-Digit Addition

Flashcard

•

Mathematics

•

3rd Grade

•

Practice Problem

•

Hard

•

CCSS

2.NBT.B.5, 2.NBT.B.7, 1.OA.B.3

Standards-aligned

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15 questions

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FLASHCARD QUESTION

Front

What is the sum of 66 and 65?

Back

131

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

FLASHCARD QUESTION

Front

What is the sum of 86 and 78?

Back

164

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

FLASHCARD QUESTION

Front

What is the sum of 73 and 29?

Back

102

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

FLASHCARD QUESTION

Front

What is the sum of 66 and 70?

Back

136

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

FLASHCARD QUESTION

Front

What is the sum of 91 and 75?

Back

166

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

FLASHCARD QUESTION

Front

What is the process of adding two-digit numbers called?

Back

Two-digit addition.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

FLASHCARD QUESTION

Front

What is the maximum sum possible when adding two two-digit numbers?

Back

The maximum sum is 198 (99 + 99).

Tags

CCSS.2.NBT.B.7

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