This section includes free
printable worksheets, tables
and flashcards for practicing subtraction with whole numbers. As with the Addition
section, there are also online flashcards that randomly ask subtraction
Use the links above or the menu options at the top to select the
resources that you need.
Subtracting with regrouping
Help your child to understand the
concept of regrouping when subtracting numbers. Work through the illustrated
example to help with this.
Recap: Base Ten Number Systems
We use the base ten number system to write numbers with each place having
a value; ones, tens, hundreds, thousands, and so on.
When subtracting numbers we often have to split-up these groups to help
us to do the subtraction. The example below shows this.
Start with the ones. 2 - 7 can't be
done. We're trying to take away more ones than we have. We need
Let's take 1 of our tens and split
it into 10 ones. We've now got 12 ones. We've also got 1 less ten.
We can now do the subtraction:
12 - 7 = 5 ones
3 - 2 = 1 ten
Common error when subtracting
As shown in the example below, when there is a need to regroup, some students take the easy and incorrect option and simply subtract the smaller digit from the larger digit.
This is a common error, especially when subtracting from multiples of 10 as shown above. Use this worksheet generator to set up lots of this type of question to provide practice with subtracting from multiples of 10.
Subtracting Across Zeros
When students regroup they often find difficulty when "the neighbor is zero" and there appears to be nothing to regroup. This difficulty can be overcome by building on their understanding of place value. For example, the number 600 can be seen as zero 1s, zero 10s, and six 100s but it can also be seen as zero 1s and sixty 10s. This understanding, together with the boxing-off method shown in the examples below, will help your children when subtracting across zeros.
You will find a good video on subtracting across zeros here .
This worksheet generator to can be set up to provide limitless practice questions with subtracting from multiples of hundreds.
You will find some subtraction games here alongside some games on addition as well.
Help with Subtraction
Library of Virtual Manipulatives has
many excellent resources including these Base
Blocks Subtraction that
you and your child can work with to help grasp the concept of whole
number subtraction, including regrouping, with the base-ten number
system. Read the instructions carefully to ensure you get maximum
benefit from these very good resources.
Note: If you are an educator and would like to use these online flashcards
on your site, then you are free to get them from the HelpingWithMath.com Download