Adding 3-Digit Numbers with Regrouping

The video tutorial teaches the addition of two three-digit numbers with regrouping. It uses colorful starfish and fish examples to demonstrate the process. The tutorial first explains the addition using visual dots for hundreds, tens, and ones, and then shows the direct addition method. The examples include adding 315 orange starfish and 526 red starfish, resulting in 841 starfish, and adding 249 angelfish and 103 goldfish, resulting in 352 fish.

What is the first step in adding two three-digit numbers with regrouping?

• Add the digits in the tens column

• Add the digits in the hundreds column

• Add the digits in the ones column

• Write the numbers in the ones column

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

How many orange starfish are there?

• 249

• 841

• 315

• 526

Tags

CCSS.1.NBT.A.1

What do the green dots represent in the starfish example?

• Hundreds

• Thousands

• Tens

• Ones

Tags

CCSS.2.NBT.A.1B

How many total starfish are there after adding 315 and 526?

• 841

• 352

• 103

• 249

Tags

CCSS.2.NBT.B.7

What is the result of adding 5 ones and 6 ones?

• 10 ones

• 11 ones

• 12 ones

• 9 ones

Tags

CCSS.2.NBT.B.6

What is the second step in the direct addition process?

• Add the digits in the hundreds column

• Add the digits in the ones column

• Write the numbers in the columns

• Add the digits in the tens column

Tags

CCSS.2.NBT.B.7

What is the sum of 315 and 526?

• 352

• 841

• 103

• 249

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

How many angelfish are there?

• 249

• 103

• 352

• 526

Tags

CCSS.1.NBT.A.1

What is the sum of 249 and 103?

• 315

• 526

• 841

• 352

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the final step in the addition process?

• Add the digits in the tens column

• Add the digits in the hundreds column

• Write the numbers in the columns

• Add the digits in the ones column

Tags

CCSS.2.NBT.B.7