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SAI INTERNATIONAL SCHOOL


                                                 CBSE CURRICULUM

                                                         Class: VI

                                                  LESSON NOTE-3.2



                                               SUBJECT: Mathematics

               CH: 3-NUMBER PLAY

               SUBTOPIC: Playing with Digits

               When we start counting numbers, we write them in order: 1, 2, 3, and so on. Let us explore
               how many numbers exist with different digit lengths.

               1-digit numbers: These are the numbers from 1 to 9, so there are 9 one-digit numbers.

               2-digit numbers: These numbers range from 10 to 99. To find out how many there are:
                     Subtract the smallest two-digit number (10) from the largest (99) and add 1.

                     99 - 10 + 1 = 90

                     So, there are 90 two-digit numbers.

               3-digit numbers: These numbers range from 100 to 999.

                     999 - 100 + 1 = 900

                     So, there are 900 three-digit numbers.
               4-digit numbers: These numbers range from 1000 to 9999.

                     9999 - 1000 + 1 = 9000

                     So, there are 9000 four-digit numbers.

               5-digit numbers: These numbers range from 10,000 to 99,999.

                     99,999 - 10,000 + 1 = 90,000

                     So, there are 90,000 five-digit numbers.




               Digit Sums of Numbers
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