1st Grade Skills in Math

Solving word problems with adding and subtracting with numbers up to 20.

Solving word problems that require adding three numbers with a maximum total of 20.

Understanding and applying the commutative (e.g. 7 + 4 = 11 then 4 + 7 = 11) and the associative (e.g. 3 + 5 + 4 = 12 then 8 + 4 = 12) properties when adding and subtracting

Recognizing the relationship between addition and subtraction to help solve subtraction problems. e.g. To solve 10 - 3, find that number that when added to 3 gives 10.

Identifying the relationship between skip counting and adding and subtracting.

Adding and subtracting with numbers to 20 using strategies including making ten. (e.g. 9 + 6 = 9 + 1 + 5 = 15 and 15 - 7 = 15 - 5 - 2 = 10 - 2 = 8) and using fact families (e.g. 8 + 3 = 11 therefore 11 - 3 = 8)

Recognizing the meaning of the equal sign and identifying its correct use. e.g. 5 = 2 + 3 is true but 3 + 2 = 4 + 3 is not.

Finding unknowns in adding and subtracting equations.
e.g. 5 + __ = 9 or 6 = __ - 4

Counting up to 120 from different starting points and reading and writing the numerals.

Recognizing that, for 2-digit numbers, the digits represent the amount of ones and the amount of tens.

Writing numbers up to 20.

Understanding place value when adding or subtracting 2-digit and 1-digit numbers and when adding or multiples of 10.

Finding 10 more or 10 less than any 2-digit number without writing or counting.

Subtracting with multiples of ten (maximum 90). e.g. 80 - 50 = 20

Comparing and ordering 3 objects by length.

Measuring the length of an object using a shorter length as a unit of length. e.g. the pencil is 4 erasers long.

Telling and writing time on the hour and on the half hour.

Categorize data into as many as three categories and make comparisons of that within these categories.

Understanding the difference between what defines a shape and what doesn't. e.g. a triangle having 3 sides is a defining attribute while the size or color is not a defining attribute.

Creating composite shapes by combining a variety of different shapes together (both 2 and 3-dimensional)

Dividing rectangles and circles into halves and quarters and using these terms to describe these equal shares.