Combining Tens and Ones

• 10 - 1 = 9
• 10 + 1 = 11
• 5 + 1 = 6

Tim ran 10 laps. Then he ran 4 more laps. How many laps did Tim run?

• 10 - 4 = 6
• 4 + 6 = 10
• 10 + 4 = 14

Don has 10 stickers.
Kat has 5 stickers and Jim has 4 stickers. How many stickers do they have?

• 10 + 9 = 19
• 10 + 5 = 15
• 10 + 4 = 14

Sal picked 10 apples. Then he picked 2 more apples. How many apples did Sal pick?

• 102
• 12
• 20

• 30 + 5
• 3 + 5
• 30 + 50

Kim has 5 boxes of 10 crayons. Her dad gives her 3 more crayons. How many crayons does Kim have now?

• 35 crayons
• 13 crayons
• 53 crayons

May drew 2 houses. One house had 10 windows. The other had 8 windows. Which number sentence shows how many windows May drew in all?

• 2 + 8 = 10
• 10 + 8 = 18
• 10 + 2 = 12

What is the sum?
40 + 6 =

• 46
• 64
• 10

70 + 2 = 

• 70 tens   2 ones
• 7 ones   2 tens
• 7 tens   2 ones

Rob has 80 shiny cars and 4 dull cars. How many cars does Rob have?

• 84
• 48
• 88