2-Digit Addition and Subtracton Using Number Line

Front

What is 2-digit addition?

Back

Adding two numbers that each have two digits, such as 42 + 19.

Front

How do you use a number line for addition?

Back

Start at the first number and move to the right by the second number.

Front

What is 2-digit subtraction?

Back

Subtracting one two-digit number from another, like 56 - 20.

Front

How do you use a number line for subtraction?

Back

Start at the first number and move to the left by the second number.

Front

What is the sum of 42 + 19?

Back

61

Front

What is the difference of 56 - 20?

Back

36

Front

What is 22 - 7?

Back

15

Front

What is the sum of 28 + 31?

Back

59

Front

What is the sum of 13 + 32?

Back

45

Front

What does it mean to 'carry' in addition?

Back

When the sum of digits in a column is more than 9, you carry over to the next column.