Mastering Two-Digit Addition Techniques

What is the initial two-digit number used in the addition example?

• 29

• 49

• 39

• 59

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

How many tens does the number 39 have?

• 3

• 4

• 2

• 5

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the total number of tens after combining 39 and 10?

• 4

• 3

• 5

• 6

Tags

CCSS.1.NBT.C.5

What is the final result of adding 39 and 10?

• 49

• 39

• 59

• 29

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

How many ones are there in the final result?

• 1

• 0

• 10

• 9

Tags

CCSS.2.OA.A.1