Adding Tens to Numbers

80+7=?

• 70

• 78

• 80

• 87

10+0=?

• 0

• 1

• 11

• 10

60+1=?

• 60

• 61

• 16

• 20

What equation does this model show?

• 33 + 26

• 32 + 63

• 23 + 36

• 63 + 23

What number does this model show?

• 48

• 59

• 60

• 68

What equation does this model show?

• 55 + 10 = 65

• 45 + 5 = 50

• 46 + 10 = 56

• 44 + 5 = 49

How would you write this model in expanded form?

• 10 + 5 = 15

• 30 + 3 = 33

• 25 + 4 = 29

• 20 + 5 = 25

When adding 34 + 29 can you regroup ten ones into a ten?

• Yes, 3 + 2 = 5

• Yes, 4 + 9 = 13

• No, 3 + 2 = 5

• No, 4 + 9 = 13

Can you make a new 10? What is the sum of the model?

• Yes, 45 + 27 = 72

• No, 45 + 27 = 62

• Yes, 45 + 27 = 62

• No, 45 + 27 = 72

Which model shows the same amount as this model?

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