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There are four sets of “subtraction within 20” worksheets:
Subtract 9 (eg. 16 - 9)
Subtract 8 (eg. 17 - 8)
Subtract 7, 8, or 9
Subtraction with numbers < 20 (eg. 17 - 6)
When subtracting 8 from a teen number (a number between 10 and 19), you can use the following method.
Let’s look at some examples:
Examples:
Subtract 8 from 14:
14 - 8 can be done in 2 steps
10 - 8 = 2
4 + 2 = 6
So, 14 − 8 = 6
Subtract 8 from 17:
17 - 8 can be done in 2 steps
10 - 8 = 2
7 + 2 = 9
So, 17 − 8 = 9
Subtract 8 from 11:
11 - 8 can be done in 2 steps
10 - 8 = 2
1 + 2 = 3
So, 11 − 8 = 3
After some practice, the student may recognize the pattern of adding 2 when subtracting 8. This approach is particularly useful for mental math, and it helps students develop their understanding of numbers and basic subtraction concepts.
Have a look at this video if you need help subtracting 8 from teen numbers.
Click on the following worksheet to get a printable pdf document.
Scroll down the page for more Subtract 8 for 1st Grade Worksheets.
(Answers on the second page)
Subtract 8 for 1st Grade Worksheet #1
Subtract 8 for 1st Grade Worksheet #2
Sprint Practice
Subtract 8 for 1st Grade Worksheet #3
Subtract 8 for 1st Grade Worksheet #4
Subtract 8 from Teen Numbers Lesson
Subtract from 9 (eg. 9 - 5)
Subtract from 10 (eg. 10 - 6)
Subtraction with numbers within 10 (eg. 8 - 2)
Subtraction Word Problems within 10
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