Exploring Double-Digit Addition Techniques

This video tutorial introduces double digit addition, starting with a review of single digit addition. It explains the technique of adding numbers by breaking them into smaller parts, focusing on the ones and tens places. The concept of regrouping is introduced for cases where the sum of a column exceeds a single digit. The video includes practice problems and a regrouping game to reinforce learning.

If Sally starts with 2 golf balls and finds 1 more, how many does she have now?

• 2

• 5

• 3

• 4

Tags

CCSS.1.OA.A.1

Sally has 5 golf balls and finds 2 more. What's her total count of golf balls?

• 9

• 6

• 7

• 8

Tags

CCSS.1.OA.A.1

If you add 5 plus 2, what number do you get?

• 6

• 8

• 7

• 9

Tags

CCSS.1.OA.A.1

Travis had 54 marbles and got 21 more for his birthday. How many marbles does he have now?

• 75

• 65

• 85

• 95

Tags

CCSS.2.OA.A.1

What is the sum of 54 plus 21?

• 74

• 75

• 76

• 77

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the sum of 30 plus 12?

• 42

• 52

• 32

• 22

Tags

CCSS.2.OA.A.1

Adding 33 and 6 gives us what total?

• 38

• 41

• 39

• 40

Tags

CCSS.2.OA.A.1

When adding 17 and 15, what is the first step in regrouping?

• Carry the one

• Add the ones place

• Add the tens place

• Split the digits

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

After regrouping 12 in the addition of 17 and 15, what do we do with the 1?

• Ignore it

• Add it to the tens place

• Leave it in the ones place

• Subtract it

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the final sum of 17 plus 15?

• 34

• 33

• 32

• 31

Tags

CCSS.2.OA.A.1