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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 __________

                  5.      H    t   O                      H   t    O    6.    H    t   O                      H   t    O

                               9    2    round off                                 8   2     round off
                       +       4    6    round off    +                    +       4   6     round off    +

                            Actual Sum____________Estimated Sum                 Actual Sum___________Estimated Sum

                  word problems
                                                                                                Remember
                  Let us learn the steps for solving word problems.                   Learn the  mnemonic to remember

                  r —  Read                                                           the steps for solving word problems.
                                                                                       “Red Ugly Dragon Sings Loudly.”
                  U —  Understand (the problem)
                  d —  Decide (the strategy -which mathematical operation required)

                  S —  Solve

                  L —  Look back (check the solution)

                  example 1: Mohit bought a DVD player for `3545 and a printer for `5499. How much

                  money did he spend?
                  Solution:   to Understand: The cost of a DVD player and a printer is given. We have to

                                 find the total money Mohit spent.

                                 to decide: To find the total money spent, we need to add the cost of both items.

                                                                             th H      t   O             th H      t   O

                                 to Solve: Cost of DVD player (in `) =        3    5   4    5             5   4    9   9
                                 Cost of printer (in `)                 = + 5      4   9    9          + 3    5    4   5
                                 Total amount spent (in `)              =     9    0   4    4             9   0    4   4

                                   To lookback (checking): Changing the order of the addtion.

                                Thus, Mohit spent `9044.

                  example 2: 5735 boxes have been put in a truck. 437 more boxes can be put in it. What
                  is the total number of boxes that can be put in the truck?

                  Solution:                                                                              th H      t   O
                               Number of boxes put in a truck                                       =     5   7    3   5
                               Number of more boxes that can be put in the truck                    = +       4    3   7

                               Total number of boxes                                                =     6   1    7   2

                               Thus, 6172 boxes can be put in the truck.

                  Mathematics-3                                                                                          45

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