Exploring 2-Digit Addition with Regrouping

What is the main educational tool used by Melissa in the video?

• Algebraic expressions

• Base 10 blocks

• Number lines

• Fraction bars

Tags

CCSS.4.NF.B.3A

How many ones are needed to regroup into a ten according to the video?

• 15 ones

• 5 ones

• 20 ones

• 10 ones

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the result of adding 9 and 4 in the context of the video?

• 12

• 14

• 15

• 13

Tags

CCSS.1.OA.A.1

After regrouping, how many tens are formed from the ones in the first example?

• 1 ten

• 2 tens

• 3 tens

• None

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the final sum of 39 plus 14 as solved using base 10 blocks?

• 52

• 55

• 54

• 53

Tags

CCSS.2.OA.A.1

How many tens are there after combining all in the first addition example?

• 5 tens

• 4 tens

• 6 tens

• 3 tens

Tags

CCSS.2.OA.A.1

What is the ones digit when adding 6 and 7 in the second problem?

• 2

• 4

• 1

• 3

Tags

CCSS.2.OA.C.3

What is the total sum of 36 plus 47 as calculated in the video?

• 85

• 84

• 82

• 83

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

How many tens are regrouped in the second addition problem?

• 3 tens

• None

• 2 tens

• 1 ten

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What method is used to check the correctness of the addition problems?

• Asking a peer

• Using a calculator

• Estimation

• Pulling down a box