Regrouping with Addition

Regrouping with Addition

A video and a few questions :)

Poll

Do you know how to regroup when you add?

• Yes

• No

• I don't know what regrouping is so...no?

Multiple Choice

In the number 234, which digit is in the ones place?

• 2

• 3

• 4

Multiple Choice

In the number 234, which digit is in the tens place?

• 2

• 3

• 4

Multiple Choice

In the number 234, which digit is in the hundreds place?

• 2

• 3

• 4

Multiple Choice

How do we line up our numbers when we add?

• However we want!

• By their place value

• By lining up their left digits first

Multiple Choice

Solve:

 $123\ +\ 45\ =$ 

• 573

• 186

• 168

Multiple Choice

Solve:

 $346\ +\ 51\ =$ 

• 397

• 856

• 379

Multiple Choice

Solve:

 $218\ +\ 30\ =$ 

• 284

• 248

• 518

Multiple Choice

When do we need to regroup (or carry the one)?

• When the digits add up to a two-digit number

• I don't know! (I should rewatch the video...)

• Whenever we want!

Multiple Choice

Solve:

 $456\ +\ 78\ =$ 

• 534

• 424

• 1153

• 500

Multiple Choice

Solve:

 $539\ +\ 64\ =$ 

• 1179

• 603

• 593

• 613

Multiple Choice

Why do we sometimes have to 'carry the 2' instead?

• Because the digits add up to 24, or 21, or some other number in the 20s

• I don't know...I should go back and rewatch...

• We never do that, ONLY CARRY THE 1 !!!

Multiple Choice

Solve:

 $165\ +\ 324\ +\ 78=$ 

• 467

• 576

• 667

• 567

Multiple Choice

Solve:

 $438\ +\ 785\ +\ 97=$ 

• 1330

• 1420

• 1320

• 1230

Poll

How confident do you feel about your addition skills now?

• Very confident!

• Confident.

• Kind of confident.

• Not confident at all.

Congratulations, you are done!