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    E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_03
                 \ 12-Sep-2024  Surender Prajapati   Proof-5                                  Reader’s Sign _______________________ Date __________

                  9.  7034 persons visited the zoo in the last three days of a week. If 3548 and 1698 persons
                       visited the zoo on Friday and Saturday respectively, how many persons visited the

                       zoo on Sunday?
                  10. Divya had `8765. She gave `1895 to her sister and `6542 to her brother. How much
                       money is left with her?

                          Encapsulate
                       math
                                                          SubtrACtiOn

                          Subtraction of 3-Digit Numbers                                    Subtraction Properties
                   Without Regrouping                                            Subtracting 0
                   Example: 578 – 126 = 452                                      Example: 45 – 0 = 45
                   With Regrouping                                               Subtracting 1
                   Example: 452 – 246 = 206
                                                                                 Example: 1246 – 1 = 1245
                                                                                 Subtraction of a number from Itself
                          Subtraction of 4-Digit Numbers                         Example: 1248 – 1248 = 0
                                                                                 Subtracting 10 from a number
                   Without Regrouping
                   Example: 9999 – 6578 = 3421                                   Example: 493 – 10 = 483
                   With Regrouping                                               Subtracting 100 from a number
                   Example: 2577 – 2099 = 478                                    Example: 2699 – 100 = 2599
                                                                                 Subtracting 1000 from a number
                              Estimating Difference                              Example: 2695 – 1000 = 1695
                   Example: Actual difference  Estimated difference
                               t O               t O                                   Addition and Subtraction together
                               8 7  rounded up   9 0                             Example: 4578 – 3795 + 2563 – 1789
                             – 6 4  rounded down  – 6 0
                               2 3               3 0                                            7141 –  5584     = 1557

                         Mental Maths
                    Fill in the missing numbers. The number in the

                    centre of each square is the difference of the                     5         even         5
                    fourth (unknown) number from the sum of the                                  29          21
                    three given numbers on the sides. One has been              odd   16 14             13          odd
                    done for you.
                                                                                       6          6           4

                                                                                      21 11      13     10   25     19
                                                                                even
                                                                                      18                      8
                                                                                                 even

                  64                                                                                    Mathematics-3

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