Basic Subtraction Facts
Basic subtraction facts using the numbers 0-20.
You need to MEMORIZE these!!!
Extended Subtraction Facts
Extended facts are basic subtraction facts multiplied by a power of 10, such as 10, 100, 1,000, etc.
Example:
16 - 7 = 9 (basic)
160 - 70 = 90 (extended)
1,600 - 700 = 900 (extended)
16.000 - 7,000 = 9,000 (extended)
9 - 4 = 5 (basic)
90 - 40 = 50 (extended)
900 - 400 = 500 (extended)
9,000 - 4,000 = 5,000 (extended)
Example:
16 - 7 = 9 (basic)
160 - 70 = 90 (extended)
1,600 - 700 = 900 (extended)
16.000 - 7,000 = 9,000 (extended)
9 - 4 = 5 (basic)
90 - 40 = 50 (extended)
900 - 400 = 500 (extended)
9,000 - 4,000 = 5,000 (extended)