Arithmetic Grade Four

Lesson Seven: Subtraction Review



Subtraction problems with two digits can be done like this: 

    34
   -23
   ----
Here's a subtraction problem with the tens and ones columns lined up.

    34
   -23
   ----
     1
STEP ONE: subtract the digits in the ones column

    34
   -23
   ----
    11
STEP TWO: subtract the digits in the tens column


Here's another example for you to study: 

    96
   -51
   ----
Here's a subtraction problem with the tens and ones columns lined up.

    96
   -51
   ----
     5
STEP ONE: subtract the digits in the ones column

    96
   -51
   ----
    45
STEP TWO: subtract the digits in the tens column

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