As you know each digit of a number in our number system has a different place value (ones, tens, hundreds, thousands, etc)
Always subtract within the same place value column when subtracting numbers.
Subtraction is to find the difference.
Example:
8
5
-
4
Step 1
Show the kids that the problem has four columns: a ones column and a tens column.
Tens
Ones
Step 2
Place the number to be subtracted below the first number, so that the tens and ones places are lined up as shown in step 3.
Draw a line under the bottom number.
Step 3
Write the problem in the columns
Tens
Ones
_
8
5
4
Step 4
First, subtract the ones
Tens
Ones
_
8
5
4
1
Next, subtract the tens
Tens
Ones
8
1
In this teaching, I am sure now you can get the answer to the problem of 85 – 4 with this subtraction one digit numbers with no regrouping which is 81 with absolutely no problem.
No Comments
No comments yet.
RSS feed for comments on this post.
Sorry, the comment form is closed at this time.