Mastering Two-Digit Addition and Subtraction

What is the first step in adding two-digit numbers?

• Multiply the two numbers

• Add the ones column first

• Add the tens column first

• Align the numbers horizontally

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What do you do if the sum of the ones column is ten or more?

• Regroup ten ones into one ten

• Ignore the extra ten

• Divide the sum by ten

• Subtract ten from the sum

Tags

CCSS.2.NBT.B.6

In the example 57 + 12, what is the sum of the tens column?

• 12

• 60

• 6

• 5

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the result of 26 + 17 using regrouping?

• 33

• 23

• 43

• 53

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

When subtracting two-digit numbers, what is the first step?

• Align the numbers vertically

• Subtract the tens column

• Check if regrouping is needed

• Subtract the ones column

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the result of 37 - 14?

• 20

• 21

• 24

• 23

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

In the subtraction example 41 - 15, why is regrouping necessary?

• The ones digit of the minuend is larger

• The tens digit of the subtrahend is larger

• The ones digit of the subtrahend is larger

• No regrouping is needed

Tags

CCSS.2.NBT.B.7

After regrouping in 41 - 15, what is the new value in the ones column before subtraction?

• 11

• 5

• 6

• 10

Tags

CCSS.7.NS.A.1C

What is the final result of subtracting 41 - 15 with regrouping?

• 26

• 25

• 24

• 23

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What happens to the tens column in the subtraction of 41 - 15 after regrouping?

• It decreases by one

• It increases by one

• It becomes zero

• It remains unchanged

Tags

CCSS.2.NBT.B.7