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SAI International School

                                      Class- VI           Sub-Mathematics


                                      Ch - 10 – The Other Side Of Zero

                                                  Weekly HA-10.2


               Date-
               Do all the questions in the HA notebook.

                  Write the inverses of these numbers: +4, –6, –3, 0, +2, –1. (Representing each


                 Positive  integer  as circular token having green colour and negative integer as red colour.



               Date-

               Do all the questions in the HA notebook.

               1.  Evaluate these expressions (you may think of them as Starting Floor + Movement by referring
               to the Building of Fun).

                a. (+1)+(+4) = _______             b. (+4)+(+1) = _______              c. (+4)+(–  3) = _______
                d. (–1)+(+2) = _______           e. (–1)+(+1) = _______       f. 0+(+2) = _________
                g. 0+(–2) = _________



               2.   Starting from different floors, find the movements required to reach Floor –5. For example, if
               I start at Floor +2, I must press –7 to reach Floor –5. The expression is (+2) + (–7) = –5. Find more
               such starting positions and the movements needed to reach Floor –5 and write the expressions.

               3. Evaluate these expressions by thinking of them as the resulting movement of combining button
               presses:

                a. (+1) +  (+4) = _____________     b. (+4) + (+1) = _____________
                c. (+4) + (–  3)  + (–2) = _______      d. (–1) + (+2)  + (–3) = ______


                4. Evaluate  the following expressions by similarly drawing or imagining a suitable lift

                a. –125 + (–30)                  b. +105 –  (–55)                  c. +105 + (+55)                   d. +80–(–150)


                e. +80  + (+150)                  f. –99– (–200)                  g. –99+(+200)                        h. +1500– (–1500)
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