Two- Digit Subtraction

When do I need to regroup in subtraction?

• When the ones are the same.
• When the number on top is larger than the number on the bottom.
• When the number on bottom is larger than the number on top.
• Never

Tags

CCSS.2.NBT.B.7

Do I need to regroup 45-18?

• Yes
• No

Tags

CCSS.2.NBT.B.5

Which of these problems does NOT require regrouping?

• 35-13
• 73-66
• 49-19
• 36-13 AND 49-19

Tags

CCSS.2.NBT.B.5

23-14

• 11
• 37
• 19
• 9

38-26

• 112
• 12
• 64
• 16

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

73-16

• 57
• 63
• 89
• 67

83-46

• 43
• 129
• 47
• 37

91-55

• 46
• 146
• 36
• 44

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2