Adding Bundles of Tens and Ones

• 3 Tens
  1 One
• 0 Tens
  3 Ones
• 3 Tens
  3 Ones
• 4 Tens
  3 Ones

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

• 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

• 4 Tens 
  4 Ones
• 4 Tens
  2 Ones
• 2 Tens
  2 ones
• 2 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

28 is:

• 8 tens and 2 ones

• 2 tens and 8 ones

• 4 tens and 6 ones

• 3 tens and 2 ones

67=

• 5 tens and 8 ones

• 6 tens and 7 ones

• 7 tens and 6 ones

• 1 ten and 4 ones

57 = ___ tens 7 ones

• 7

• 5

• 3

• 2