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    E:\Working\Focus_Learning\Math_Genius_1_(05-10-2023)\Open_Files\08_Chap_7\Chap_7
                   \ 11-Sep-2024  Bharat arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                  Addition And subtrACtion stories

                  To solve a word problem, first we                                 Keywords used

                  decide whether to add or subtract. Addition: in all, total, together, altogether, sum
                  Then we solve the problem                     Subtraction: more, less, left, difference, taking away
                  accordingly.

                  Example 1: 62 people are sitting in a hall. 20 more people join them. How many

                  people are there in all?

                  Solution: Keyword used: in all.                                                             tens Ones

                  This is an addition problem.                                                                  6      2
                  So,  62 + 20 = 82 people                                                                  +   2      0

                    Thus, 82 people are there in the hall now.                                                  8      2

                  Example 2: Siya had 36 ribbons. She gave

                  12 ribbons to Jiya. How many ribbons are left with Siya?

                  Solution: Keyword used: left.                                                               tens Ones
                  This is a subtraction problem.                                                                3      6

                  So, 36 – 12 = 24 ribbons                                                                  –   1      2

                    Thus, 24 ribbons are left with Siya.                                                        2      4

                           Practice time 7H

                  Read the story sums and solve.
                   1. Lucky went to a grocery store. He                                                      tens Ones

                        bought 15 packs of cookies and 12
                        packs of noodles. How many packs of

                        groceries did he buy in all?

                        Ans. He bought ____ packs in all.

                   2. 63 birds are sitting on a tree. 11 birds                                               tens Ones
                        fly away. How many birds are left on

                        the tree now?

                        Ans. There are ____ birds on the tree.

                 114                                                                                     Mathematics-1

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