Number Sense, Addition and Subtraction

The first building block of elementary mathematics education is number sense, along with addition and subtraction. It starts at kindergarten and forms the core of the first and second grade curriculum.

Addition and Subtraction for numbers to 10

Number Sense, Addition and Subtraction

Once students gain number sense and become comfortable with counting and associating quantities with numbers, the notion of how far apart a pair of numbers are introduced, which naturally leads to the concepts of addition and subtraction.

Related Posts

Happy Holidays!

Happy Holidays!

We still can’t believe we’re wearing T-shirts on Christmas Eve in Boston (It’s…

Remainder 6 or 60?

Remainder 6 or 60?

This just happened in our fifth grade class a couple of weeks ago.…

Squares and Triangles

Squares and Triangles

One day after class, a parent came to me and ask about a…

Free worksheet – Counting the Twelve Days of Christmas

Free worksheet – Counting the Twelve Days of Christmas

Christmas is just around the corner… How about a little math twist on…

Related Worksheets

(Worksheets are part of our Members’ Resources)

Grade 1:

Grade 2:

Grade 3:

Grade 4:

Grade 5:

Looking for full grade lesson plans?

Join our membership program. Start your Free Trial!

singapore math resources

Our full-year Singapore math resources are aligned with major Singapore based textbooks, such as Math in Focus, Primary Mathematics etc. These resources, including lesson plans, videos, worksheets and more, are available for unlimited access (all grades) in our membership program.

The Starting Point – Number Sense, Addition and Subtraction

Number sense can refer to “an intuitive understanding of numbers, their magnitude, relationships, and how they are affected by operations”, for example the ability to understand quantities and concepts like more and less.

This skill is then extended to the understanding how far two numbers are separated, which leads naturally to the concepts of adding and subtracting. This is introduced in steps, starting with numbers within 10 (i.e. within single digit numbers up to 10), then extending to more place values, numbers to 20, 40 and 100 (first grade), then to 1,000 (second grade), 10,000 (third grade), and onto higher orders in grades four and five.

Developing these foundation skills takes up the main part of the first and second grade elementary mathematics curriculum – developing number sense, understanding the two basic operations, and extending to multiple place values. It is one of the most important part of a student’s learning in elementary school.

Free Worksheets

Looking for some practice questions on Addition and Subtraction for numbers to 10? Click here to download a free set of pdf worksheets now!

Join our membership to get all our math resources for grades 1 to 5

Scroll to Top