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    E:\Working\Brother_Education\Preparatory_Stage_Maths-3_(11-09-2024)\Open_Files\CHAP_02
                 \ 02-Nov-2023               Sonia Suyal   Proof-1                            Reader’s Sign _______________________ Date __________

                  1.  Add the following:

                       (a)     H    t   O       (b)     H   t    O       (c)     H   t    O      (d)     H    t    O

                                    8   5               6   4    6               4   2    1                   8    0
                            +       4   3           + 2     7    1           +       6    4           + 2     5    9

                  2.  Refer the information given on the previous page and find the total number of plants
                       planted by the school this year.

                  Addition

                  In class II, you learned how to add 2-digit             H   t    O
                  and 3-digit numbers.
                                                                          3   4    2
                  Let us revise the terms of addition while            + 4    5    6    Addends (numbers that are added)
                  adding numbers.                                         7   9    8    Sum (answer of addition)

                  Addition By ExpAnding thE AddEnds

                  Let us explore the way to make addition easy.
                  example: add 145 and 512.

                  Solution:
                  Step 1:  Expand both the addends  Step 2: Add ones Step 3: Add tens Step 4: Add hundreds

                           into hundreds, tens and              H    t O            H   t O                 H    t O
                           ones.
                                                               100 40 5           100 40 5                 100 40 5
                     145   100 + 40 + 5                      + 500 10 2         + 500 10 2               + 500 10 2
                     512   500 + 10 + 2                                 7               50 7               600 50 7

                           Since 600 + 50 + 7 = 657, the sum of 145 and 512 is 657.

                           practice time 2A

                  1.  Find the sum of the following.

                       (a)     H    t   O       (b)     H   t    O       (c)     H   t    O      (d)     H    t    O
                               2    1   7               4   8    7               5   5    5               2   3    4
                            + 3     4   2           + 1     1    1           + 1     3    1           + 5     1    1

                  30                                                                                    Mathematics-3

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