Exploring 2 Digit Addition with Regrouping

This video tutorial on Missiles Learning Channel focuses on teaching two-digit addition with regrouping using the expanded form strategy, also known as partial sums. The instructor demonstrates the process with the example of 48 plus 27, guiding viewers through setting up the problem, expanding numbers into tens and ones, and adding the columns separately to reach the final answer of 75.

What strategy is used for two-digit addition in the video?

• Cluster sums

• Partial sums

• Complete sums

• Aggregate sums

Tags

CCSS.2.NBT.B.7

What is the first step in solving the addition problem presented?

• Drawing arrows

• Writing the problem

• Expanding numbers

• Adding numbers

Tags

CCSS.2.NBT.B.7

What is the purpose of drawing placeholders?

• To subtract numbers

• To organize work

• To add numbers

• To multiply numbers

Tags

CCSS.5.NBT.B.5

What does the number 48 expand to?

• 48 + 0

• 4 + 8

• 40 + 8

• 400 + 80

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the sum of the ones column in the problem 48 + 27?

• 15

• 12

• 10

• 17

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Which columns are added first in this method?

• Tens and ones

• Thousands and hundreds

• Hundreds and tens

• Ones and tens

Tags

CCSS.2.NBT.B.7

What is the sum of 40 and 20?

• 80

• 50

• 70

• 60

Tags

CCSS.2.NBT.B.5

How is the number 15 expanded for further addition?

• 1 + 5

• 10 + 5

• 15 + 0

• 5 + 10

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the final sum of 70 and 5?

• 65

• 75

• 85

• 70

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

What is the final answer written under in the problem?

• The equal sign

• The placeholders

• The problem statement

• The operation circle

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5