Adding Tens Number Line

___+ 30 = 80

50 + 30 = ____

• 1 Ten
  6 Ones
• 1 Ten
  3 Ones
• 6 Tens
  1 One
• 3 Tens
  4 Ones

• 3 Ten
  3 Ones
• 0 Ten
  5 Ones
• 3 Tens
  5 Ones
• 5 Tens
  3 Ones

• 30 + 5
• 3 + 5
• 30 + 50

• 0 Tens 
  10 Ones
• 3 Tens
  0 Ones
• 3 Tens
  3 Ones
• 0 Tens 
  3 Ones

• 2 Tens 
  5 Ones
• 2 Tens
  0 Ones
• 2 Tens
  3 Ones
• 3 Tens
  2 Ones

67=

• 5 tens and 8 ones

• 6 tens and 7 ones

• 7 tens and 6 ones

• 1 ten and 4 ones

How many tens do you need to make the number 80?

• 20

• 8

• 80

How many?

• 50

• 45

• 41

• 55