Double Digit Addition and Subtraction without regrouping.#1

Front

What is double digit addition?

Back

Double digit addition is the process of adding two numbers that each have two digits, such as 15 + 12.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is double digit subtraction?

Back

Double digit subtraction is the process of subtracting one two-digit number from another, such as 74 - 31.

Tags

CCSS.7.NS.A.1C

Front

What does 'without regrouping' mean in addition?

Back

'Without regrouping' means that when you add the digits in each place value, the sum is less than 10, so you don't need to carry over to the next place.

Tags

CCSS.2.NBT.B.7

Front

What does 'without regrouping' mean in subtraction?

Back

'Without regrouping' means that when you subtract the digits in each place value, the top digit is larger than the bottom digit, so you don't need to borrow from the next place.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

Calculate: 15 + 12

Back

27

Tags

CCSS.1.OA.A.1

Front

Calculate: 10 + 23

Back

33

Tags

CCSS.2.NBT.B.5

Front

Calculate: 74 - 31

Back

43

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

Calculate: 29 + 30

Back

59

Tags

CCSS.2.NBT.B.5

Front

Calculate: 89 - 43

Back

46

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the sum of 20 and 15?

Back

35

Tags

CCSS.2.NBT.B.5