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    Mental Maths

                                                                                                   21 st
                    1.  Choose the correct option.                                                Century   #Critical Thinking
                                                                                                  Skills
                       a.  Adding 4 tens, 5 hundreds and 6 ones to 3867 can be expressed as:
                              i.  3867 + 8 + 40 + 500                       ii.  3867 + 5 + 60 + 400

                             iii.  3867 + 40 + 500 + 6                     iv.  3867 + 400 + 50 + 6

                       b.  The greatest 3-digit number added to 12 gives:

                              i.  99912             ii.  12999              iii.  1011             iv.  1101

                    2.  Express the number as a sum of                                      +         +        +
                        other numbers:

                                                                        +         +             3124            +

                                                                                                 +

                                                                                                       HOTS

                                                                                                   21 st
                                                                                                  Century   #Subject Enrichment
                                                                                                  Skills

                    1. Arrange the digits 1 to 9 in such a way that
                        the sum of the digits on each side of the
                        triangle is 20.

                    2.   Write  the  numbers in the  smiley  faces                                                 90
                        that add up to make the number in each                                   156
                        triangle.
                                                                              108                                  248

                                                                                                 200

                        52       Mathematics 3

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