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                iDEntiFyinG tHE mAtHEmAtiCAl opErAtionS                                           Century   #Critical Thinking
                                                                                                  Skills
                The  process of identifying  the mathematical  operation  involves deciding  which
                mathematical  operation  (addition,  subtraction,  multiplication,  or division)  will be
                useful in solving a word problem.

                Example 1. Rachna had 12 ribbons. Her mother gave her 5 more ribbons.
                How many ribbons does she have in all?

                Solution. Operation:  +          –     ×    ÷  Answer: 12 + 5 = 17 ribbons

                Example 2. Soni had a packet of 12 pencils. She lost 2 pencils at school.
                How many pencils does she have left?

                Solution. Operation:  +          –     ×    ÷  Answer: 12 – 2 = 10 pencils

                Example 3. A pack of cards has 12 cards. How many cards will be there
                in 4 such packets?

                Solution. Operation:  +          –     ×    ÷  Answer: 12 × 4 = 48 cards

                Example 4. The cost of 8 oranges is `80. What is the cost of 1 orange?

                Solution. Operation:  +          –     ×    ÷  Answer: `80 ÷ 8 = `10

                            Exercise 5I

                tick (  ) the correct mathematical operation. then find the answer.

                    1.  There are 5 pencils in box A and 9 pencils in box B. How many pencils
                        are there altogether in the two boxes.

                         +     –    ×     ÷              Answer: ____________________

                    2.  There are 2 mangoes in each basket. How many mangoes are there in
                        5 such baskets?

                         +     –    ×     ÷              Answer: ____________________

                    3.  There are 10 oranges. Anjali ate 3 oranges. How many oranges are left?

                         +     –    ×     ÷              Answer: ____________________

                       104       Mathematics 3

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