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                   \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________

                  She puts 2 beads on the hundreds spike, 3 beads on the tens spike and 4 beads on

                  the ones spike. This represents 2 hundreds, 3 tens and 4 ones.

                  Thus, the abacus shows the number 234, read as two hundred thirty-four.

                  Now, look at the abacus given alongside.

                  It has 5 hundreds, 0 tens and 9 ones.

                  So, the abacus shows the number 509, read as                           H       T     O

                  five hundred nine.                                                                No beads in the tens

                                                                                                    place means 0 tens.

                          Knowledge Desk
                                                                                         Think Tank
                        ABACUS is the standard form of Abundant Beads,                  A spike cannot have more than 9
                        Addition and Calculation Utility Systems.                       beads. Can you think why?

                           Practice time 1C

                  1.  Write the numbers shown on the abacus. One has been done for you.

                        (a)                      (b)                     (c)                      (d)

                                H     T     O            H     T     O            H     T     O            H     T    O

                                    243

                  2.  draw beads on each abacus to represent the given number.

                        (a)                      (b)                     (c)                      (d)

                                H     T     O            H     T     O            H     T     O            H     T    O

                                    194                      371                      490                      798

                          Think Tank                    Critical Thinking  PLaCE VaLUE aND FaCE VaLUE
                        Mishka  has  an abacus  with
                        3 spikes showing  hundreds, tens and       Place Value
                        ones respectively. She has  3 beads.
                        Which is the smallest 3-digit number       The place value of a digit in a number depends
                        that can be formed by these beads?         upon its place or position in the number.

                  Mathematics-2                                                                                          17

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