Page 37 - SPARK OF MATH book 4
P. 37

(2-3) Multiplication of 2-Digits by 2-Digits.




                  1     First, multiply 3x54                            1         Then, multiply 20x54, and

                 54     (3×4=12) regroup1                               54        put the result underneath
                        (3×5=15 tens)(15+1=16 ten)
                 2 3 so, 3×54=162                                       2 3       162.
                                                                                  so, 20×54=1080
              162                                                    162
                                                                  1080                  (4×8= 32)




                   Finally, add the partial products
                                                                                       1
                       1
                                   1                                                  54
                      54           162
                                                                                      23
                      23        1080
                                                                                   162
                   162          1242                                             1080

                1080
                                                                                 1242
                1242


                Multiply.



                              43                           41                          89

                           ×  21                         ×  33                      ×  54













                            73                            79                          86

                          ×  40                        ×  81                       ×  62

















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