First grade math 

Find here many important first grade math concepts taught in first grade.  Teachers, parents, and math tutors can also use them as a guideline to illustrate a math lesson or to teach important skills that kids are supposed to know in first grade math.

Equal parts or equal shares

The orange circle has 2 equal parts.

The blue circle has 4 equal parts



Arrays

The first array is made of soccer balls.
The array has 2 rows and 3 columns.
2 × 3 = 6 balls
The second array is made of squares.The array has 3 rows and 5 columns.
3 × 5 = 15 squares

Arrays


Quarter

Quarter = one-fourth = 1 of 4 equal parts




Associative property



Closed figure

All sides of a closed figure are connected.

Closed figures


Hour hand

The hour hand takes 1 hour to move from a number to the next. 

Hour or hr = 60 minutes.

Hour hand


Estimate

An estimate is not the same as an exact answer. We just need a number close to the exact amount. To estimate the number of marbles, we just need to know about how many

Possible answers: 15, 14, or 17



Commutative property
Whether 2 is written first or not, the answer to 2 + 1 is still 3

Commutative property



2-dimensional figures

2-dimensional shapes



Types of clocks



Cube:

A cube has 6 faces, 12 edges and 8 vertices. The cube on the right shows 3 faces with the color red, blue, and orange.




Multiple of 10




Counting up

Start at 3 and count 2 more to reach 5.

Counting up


Number

A number indicates how many or how much. A numeral is used to represent the number of objects. For example, after counting the pencils on the right, we get 4. We use the numeral 4 to represent 4 pencils.



3-dimensional shapes.

3 dimensional shapes are solid shapes that have width, length, and height.

3-dimensional shapes



Make 10


Make 10


Minute hand

The minute hand takes 5 minutes to move from a number to the next. 

Minute = seconds.

Minute hand


Different

The two triangles are different, but they have the same shape.

Different size triangle


Counting down

Start at 6 and count backward to reach 2.



Composite shape

The arrow on the right is a composite shape since it is made from 2 basic shapes ( a triangle and a rectangle)

Composite shape




Collecting data


Collecting data


Expression

An expression has no equal sign

Expression


Coins
1 penny = 1 cent
1 nickel = 5 cents
1 dime = 10 cents
1 quarter  = 25 cents

2 dimes + 1 quarter + 3 nickels = 60 cents




Equation

Equation always have an equal sign. The amount on the left side is equal to the amount on the right side.

Equation




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