Kindergarten Mathematics
Unit 1
Counitng, Cardinality and Algebraic Thinking with Numbers to 10
Printable Parent Letter
During Unit 1, your children will use numbers to 10, including written numerals, to represent quantities and to solve quantitative problems, such as counting objects in a set; counting out a given number of objects; comparing sets or numerals; and modeling simple joining and separating situations with sets of objects, or eventually with equations such as 5 + 2 = 7 and 7 – 2 = 5.

Students need to:
 Count to 100 by ones and tens
 Count forward from a number other than 1
 Write the numbers 010 and represent an amount of object with a written numeral
 Count up to 10 objects one at a time, giving each object a number name
 Understand that the last number said names the total amount for a group of objects
 Understand that each successive number name refers to a quantity that is one larger
 Count to answer "how many?" questions about as many as 10 things arranged in a line, a rectangular array, or a circle, or a scattered configuration
 Count out a set of up to 10 objects
 Identify whether the number of objects in a one group is greater than, less than, or equal to the number of objects in another group
 Compare two numbers between 1 and 10 presented as written numerals
 Represent and solve addition and subtraction word problems and add and subtract within 10 (e.g. using objects or drawings to represent the problem).
 Separate a number into two parts and understand that there is a relationship between the parts and the whole for numbers 010 and record with a drawing or equation and understand that the values on each side of the equal sign are the same
 For any number from one to nine find the number that makes ten when added to the given number
 Begins to work towards goal of fluently adding and subtracting within 5 by applying knowledge of decomposition.

Carroll County Public School Video Support
Working with Tens Frames
Modeling with a Tens Frame
Numbers to Ten
Modeling Problem Solving
Solving Problems With Addition and Subtraction

Ways Parents Can Help
 Practice counting forward with your child to 100
 Practice counting forward starting with a number other than 1
 Practice putting number cards in order
 Count things around the house (steps, toys, food items…
 Use a die to see if your child can name the number without counting the dots
 Practice writing the numbers up to 10
 Build sets representing a number 010 together using things around the house
 Practice adding and subtracting things around the house (i.e. 3 red grapes and 3 green grapes – how many grapes in all or start with 6 grapes eat two – how many are left)

Some Support Sites
Count to 1o
Count to 100
Counting Train
Whack a Mole
Using a Ten Frame
Balloon Pop Count and Order
Balloon Pop Compare Numbers
Balloon Pop Comparison Symbols

Key Vocabulary to Know 
Add/Addition
As many as
Compare
Equal
Fewer than
Five frame
Greater than
Join
Least
Less/Less than
More
More than

Most
Number path
One less
One more
Partpartwhole
Plus
Put together
Same
Separate
Subtract
Subtraction
Take apart
Ten frame
