照例子先標(biāo)出運(yùn)算順序,再計(jì)算。
例:120-(81+38÷19
                          ①     
                          ②      
                          ③
(1)(78×15+380)×5 (2)275×15+308×13
(3)(5008-99×36)÷19 (4)(160+880)÷20×4
(1)(78×15+380)×5
                 ①           
                 ②                      
                 ③
原式=(1170+380)×5
       =1550×5
       =7750
(2)275×15+308×13
              ①          ①      
                      ②
原式= 4125+4004
       =8129
(3)(5008-99×36)÷19
                        ①       
                        ②                
                       ③
原式=(5008-3564)÷19
       =1444÷19
       =76
(4)(160+880)÷20×4
                  ①              
                  ②                     
                  ③
原式=1040÷20×4
       =52×4
       =208
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

同步練習(xí)冊(cè)答案