Add Tens and Ones on an Open Number Line

Use the open number line on your paper to find the sum. 30 + 10 = ____

Use the open number line on your paper to find the sum. 55 + 30 = ____

Use the open number line on your paper to find the sum. 23 + 20 = ____

Use the open number line on your paper to find the sum. 46 + 40 = ____

Sam has 38 golf balls. He gets 20 more golf balls. How many golf balls does Sam have now?

Break apart number the second addend on your paper. Write the sum here. 23 + 26 = ___

• 55

• 49

• 40

Break apart number the second addend on your paper. Write the sum here. 51+42 = ___

• 93

• 90

• 39

Billy puts 34 skateboard wheels in a pile. He puts 34 more wheels in another pile. How many wheels does Billy have in all?

• 86

• 62

• 68

Cindy has 15 more toy planes than Julie. Julie has 12 toy planes. How many toy planes does Cindy have?

• 27

• 15

• 72

Break apart number the second addend on your paper. Write the sum here. 33 + 49 = ___

• 82

• 83

• 72