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    E:\Working\Focus_Learning\Math_Genius_2_(09-10-2023)\Open_Files\Chap_09
                   \ 26-Feb-2024  Bharat Arora   Proof-5                                    Reader’s Sign _______________________ Date __________

                                       Learning by Doing

                  Objective: To estimate the length, weight and capacity and compare.
                  Materials Required:

                  For length: A paint-brush, water bottle or any other things

                  For weight: A toothpaste packet, soap or any other things on which weights are

                  mentioned
                  For capacity: A cold-drink bottle/can, a juice packet or any other things on which

                  capacity is mentioned
                  Procedure:

                          The students perform the activity in pairs.

                          One member guesses the length of a paint-brush and write its estimated

                          length.
                          The other member measures the actual length of the paint-brush using a

                          centimetre ruler and write it.

                          Now, the first member takes a toothpaste packet in his/her hand and guesses
                          its weight. He/she write its estimated weight.

                          The other member reads the weight mentioned on the toothpaste packet

                          and write it.
                          Now, the first member takes a soft-drink bottle and write its estimated capacity.

                          The other member reads the capacity of the soft-drink bottle mentioned  on

                          it and write it.
                          Similarly, the length, weight and capacity of other objects can be estimated

                          and compared with actual measurement.

                          Mental Maths
                     1.  Fill in the blanks.
                         (a)  1 m = ___ cm               (b)  100 cm + 100 cm = ___ m (c)  1 kg = ___ g
                             1                                1                                  1
                         (d)   kg = ___ g                (e)   L = ___ mL                     (f)   L = ___ mL
                             2                                4                                  2
                     2.  Name any container having a capacity of more than 1 L.

                     3.  What is the length of a toothpick: 5 cm or 5 m?
                     4.  How many centimetres are there in two metres?

                  Mathematics-2                                                                                         169

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