Page 35 - SPARK OF MATH book 4
P. 35

Multiplication of 3-Digits by 1.






                                                                 1  3
                     3                                                     Multiply 4 by 3
                            Multiply 4                           5 3 8
                  53 8                                                     tens
                            by 8 ones                                 4    (4×3= 12 tens)
                       4    (4×8= 32)                                      Add 1

                                                                    5 2
                       2    Regroup                                        (12+3= 15 tens)
                                                                           Regroup 1




                1  3
                5 3 8       Multiply 4 by 5 hundreds

                      4     (4×5= 20hundreds)


              21   52       (20+1= 21hundreds)
                            Regroup




               Practice.





                          273                             234                             580
                      ×                               ×                               ×
                              5                                8                              2











                          300                             732                             801
                      ×                               ×                               ×
                              4                                9                              4

















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