Understanding Addition and Re-grouping

The video tutorial provides a review of adding two-digit numbers, focusing on sums involving three to four numbers. It demonstrates solving two problems using re-grouping techniques, emphasizing the importance of starting with the units position and re-grouping tens. The tutorial concludes with a reminder to always account for re-grouped numbers.

What types of sums are being reviewed in this lesson?

• Sums of four-digit numbers

• Sums of three-digit numbers

• Sums of two-digit numbers

• Sums of single-digit numbers

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the first step in solving the sum 16 + 12 + 24?

• Add the units place first

• Multiply the numbers

• Add the tens place first

• Subtract the smaller number

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the sum of the units place in 16 + 12 + 24?

• 12

• 16

• 10

• 14

Tags

CCSS.2.NBT.B.7

What do you do with the number 1 after summing the units place in 16 + 12 + 24?

• Ignore it

• Multiply it by 2

• Add it to the tens place

• Subtract it from the total

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the final sum of 16 + 12 + 24?

• 62

• 42

• 52

• 72

Tags

CCSS.1.OA.A.1

How many numbers are being added in the second sum?

• Five

• Four

• Three

• Two

Tags

CCSS.3.OA.D.9

What is the sum of the units place in 1 + 3 + 3 + 6?

• 12

• 11

• 10

• 13

What is the final sum of 1 + 3 + 3 + 6?

• 73

• 83

• 53

• 63

Tags

CCSS.1.OA.A.1

Why is re-grouping important in addition?

• It simplifies multiplication

• It helps in subtraction

• It is used in division

• It ensures accurate addition

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What should you not forget to add after re-grouping?

• The re-grouped number

• The original number

• The tens place

• The units place

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5