Tính nhẩm.

a) 48 256 × 10                                     5 437 × 100                               7 192 × 1 000

b) 625 400 : 100                                  395 800 : 10                              960 000 : 1 000

a) 48 256 × 10 = 482 560         

5 437 × 100 = 543 700             

7 192 × 1 000 = 7 192 000

b) 625 400 : 100 = 6 254                    

395 800 : 10 = 39 580                        

960 000 : 1 000 = 960