Massey logo
Home > College of Sciences > Institute of Fundamental Sciences >
Maths First > Online Maths Help > Arithmetic > Decimals > Decimal Arithmetic > Multiplication
MathsFirst logo College of Science Brandstrip
  Home  |  Study  |  Research  |  Extramural  |  Campuses  |  Colleges  |  About Massey  |  Library  |  Fees  |  Enrolment


Decimal Arithmetic


Two decimal numbers may be multiplied as follows:

  • the numbers are written one below the other with the rightmost digit aligned
  • starting on the right, multiply each digit in the top number by each digit in the bottom number, just as with whole numbers (ignore the decimal points)
  • add the products
  • place the decimal point in the answer by starting at the right and moving a number of places equal to the sum of the decimal places in both numbers multiplied


Example 3A.

Let us calculate:   23.45*2.3

answer is 53.935

Example 3B.

Each time you click "New Example" a new example will be shown. Click "=" to see the answer.




Exercise 3.

Perform the following multiplication without using a calculator:

  × =

<< Subtraction | Decimals Index | Division >>


   Contact Us | About Massey University | Sitemap | Disclaimer | Last updated: November 21, 2012     © Massey University 2003