Page 74 - SK Year 5 Mathematics DLP
P. 74

My mass is             Calculate dad’s mass.
                 2       1
                       3   times yours.            1
                        2
                                                3   × 26 kg =         kg
                                                  2
                                                  Method 1

                                                                          13
                                                          1          7   26
                                                        3   × 26 =   ×
                                                          2         2     1
                                                                     1
                                                                  = 91
                                                  Method 2


                                                 26 kg         26 kg          26 kg      13 kg 13 kg


                                                          1                       1   13
                                                        3   × 26 = (3 × 26) + (  × 26)
                                                          2                      2
                                        26.0 kg                   = 78 + 13       1
                                                                  = 91

                                                          1
                                  1                     3   × 26 kg  =  91  kg
                         Is 26 × 3   kg = 91 kg?          2
                                  2
                                Discuss.                Dad’s mass is 91 kg.





                            9
                 3  16 × 5   =
                            10
                            9     8    59
                    16 × 5   = 16 ×
                            10         10
                                        5
                                 472             0 9 4
                               =
                                   5          5 4 7 2
                                     2         −0
                               =     94
                                     5           4 7
                                               −4 5
                                                   2 2
                                                 − 2 0
                                                     2


                            9         2
                    16 × 5   =  94
                            10        5


             66                      • Recall the methods to determine whole numbers,
                               2.1.1   denominators, and numerators when dividing to convert
                                       improper fractions to mixed numbers.
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