(1)1000-71×8, =1000-568, =432; (2)(1800-800)×4, =1000×4, =4000; (3)19×96-962÷74, =1824-13, =1811; (4)(639-71×9)÷167, =(639-639)÷167, =0÷167, =0; (5)(10800-800×4)÷4, =(10800-3200)÷4, =7600÷4, =1900; (6)10000-(59+66)×64, =10000-125×64, =10000-125×8×8, =10000-1000×8, =10000-8000, =2000. |