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(1)1000-25×32, =1000-800, =200; 答:差是200. (2)320×85=27200; 答:这个数是27200. (3) 1 7 ×2+ 1 7 ×4, = 2 7 + 4 7 , = 6 7 ; 答:和是 6 7 . (4)1- 1 9 ×5, =1- 5 9 , = 4 9 ; 答:比1少 4 9 .