Page 37 - SK Year 5 Mathematics DLP
P. 37

6  3 × 310 247 =                        7  14 095 × 70 =

                                 1 2                             2    6 3       Multiply 14 095
                         3 1 0 2 4 7                             1 4 0 9 5      by 7. Then, write
                       ×             3                         ×          7 0   one 0.
                         9 3 0 7 4 1                             9 8 6 6 5 0



                      3 × 310 247 =  930 741                  14 095 × 70 =  986 650





                   8  43 × 2 604 =


                      Method 1
                                                                                       Total up the
                    Multiply ones                  Multiply tens                       products
                       1    1                             2     1                              2 6 0 4
                       2 6 0 4                            2 6 0 4                       ×          4 3
                    ×       4 3                    ×           4 3                           1  7 8 1 2
                       7 8 1 2 2 604 × 3                  7 8 1 2                       + 1 0 4 1 6 0
                                                     1 0 4 1 6 0 2 604 × 40               1 1 1 9 7 2


                      Method 2

                                     I use the
                                     Lattice method
                                     to multiply.












                                                         43 × 2 604 =  111 972



                                                      Compare methods 1 and 2.
                                                  Which method would you choose?




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                             1.6.3
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