Two digit addition with regrouping

Front

What is two-digit addition with regrouping?

Back

Two-digit addition with regrouping is a method used to add two-digit numbers where the sum of the digits in a column exceeds 9, requiring the 'carrying over' of the extra value to the next column.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

How do you perform two-digit addition without regrouping?

Back

To perform two-digit addition without regrouping, simply add the digits in each column (tens and ones) without exceeding 9, writing the sum directly below.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

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

Back

The first step is to align the numbers by place value (tens and ones) and start adding from the rightmost column (ones place).

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

When adding 53 + 28, what is the sum of the ones place?

Back

The sum of the ones place is 3 + 8 = 11. Since this exceeds 9, you regroup by carrying over 1 to the tens place.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What do you do when the sum of the digits in a column exceeds 9?

Back

When the sum exceeds 9, you write down the rightmost digit of the sum in that column and carry over the leftmost digit to the next column.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

In the problem 27 + 62, what is the total in the ones place before regrouping?

Back

The total in the ones place is 7 + 2 = 9, which does not require regrouping.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

How do you find the total number of items when combining two groups?

Back

To find the total number of items when combining two groups, simply add the quantities of each group together.

Tags

CCSS.2.OA.C.4

Front

What is the importance of place value in addition?

Back

Place value is important in addition because it helps to correctly align numbers and ensures that each digit is added in its respective column (ones, tens, etc.).

Tags

CCSS.2.NBT.B.7

Front

What is the result of adding 37 and 17?

Back

The result of adding 37 and 17 is 54.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

How can you check your addition for accuracy?

Back

You can check your addition by performing the inverse operation (subtraction) or by estimating the sum before calculating.

Tags

CCSS.1.OA.A.1