问题 计算题
脱式计算.  (12分)  
(1)105÷7 ×18 (2)(603-246) ÷7   (3)520÷(45÷9)  
(4)512-112÷4 (5)45×34+66  (6)(200-162) ×21
                                           
答案

(1)原式=15×18

                   =270(2)原式=357÷7

                   =51(3)原式=520÷5

                   =104

(4)原式=512-28

                   =484(5)原式=1530+66

                   =1596(6)原式=38×21

                   =798

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