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                            Step 3:   Add the hundreds. 4 hundreds + 3 hundreds = 7 hundreds

                                          Write 7 in the hundreds column.
                            Step 4:   Add the thousands. 2 thousands + 4 thousands = 6 thousands


                                          Write 6 in the thousands column.
                            Step 5:    Add the ten thousands. 3 ten thousands + 2 ten thousands = 5

                                        ten thousands. Write 5 in the ten thousands column.

                            Thus, 32,475 + 24,312 = 56,787.

              example 2: Add 4,71,223 and 2,21,252.
              Solution:  Step 1:  Add the ones. 3 ones + 2 ones = 5 ones                     L tth th H T O

                                       Write 5 in the ones column.                           4    7    1 2 2 3

                            Step 2:  Add the tens. 2 tens + 5 tens = 7 tens              + 2      2    1 2 5 2
                                       Write 7 in the tens column.                           6    9    2 4 7 5

                            Step 3:  Add the hundreds. 2 hundreds + 2 hundreds = 4 hundreds
                                       Write 4 in the hundreds column.

                            Step 4:  Add the thousands. 1 thousand + 1 thousand = 2 thousands

                                       Write 2 in the thousands column.
                            Step 5:   Add the ten thousands. 7 ten thousands                  Knowledge Desk
                                       + 2 ten thousands = 9 ten thousands.                 In an addition, the

                                       Write 9 in the ten thousands column.                 first number is also
                                                                                            called augend. For
                            Step 6:  Add the lakhs. 4 lakhs + 2 lakhs = 6 lakhs             example in 10 + 11 =
                                                                                            21, 10 is the augend
                                       Write 6 in the lakhs column.                         and 11 is the addend.

                            Thus, 4,71,223 + 2,21,252 = 6,92,475.                           Generally, both 10 and
                                                                                            11 are called addends.
              example 3: Add 52,301 + 12,257 + 20,220.                                      Summands is another
              Solution:          tth th      H     T   O                                    name for addends.

                                  5     2     3    0    1       Addend 1 (Augend)

                                  1     2     2    5    7       Addend 2
                             +    2     0     2    2    0       Addend 3
                                  8     4     7    7    8

                                                                Added ones (1 + 7 + 0 = 8)
                                                                Added tens (0 + 5 + 2 = 7)
                                                                Added hundreds (3 + 2 + 2 = 7)
                                                                Added thousands (2 + 2 + 0 = 4)
                                                                Added ten thousands (5 + 1 + 2 = 8)
                            Thus, 52,301 + 12,257 + 20,220 = 84,778.



              Mathematics-4                                                                                          33
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