1st Grade Worksheets - Add and subtract within 20.


Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).


Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).


Screenshot Name / Description Flag? Rating
Counting with Dots Worksheet
Use dots as an aid to assist in addition under 20.
Basic Addition Worksheet
Practice adding two numbers up to 9.
Math Facts Worksheet
Practice basic addition with two digits less than 30.
Subtraction Within 20 Worksheet
Subtract a one-digit number from a two-digit number.
One-Digit Addition Practice Worksheet
Practice adding two numbers up to 9.

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