| 选择适合你的方法计算,并写出过程. (1)208×13-3672÷18 (2)4×505×25 (3)[332-(32+278)]×186 (4)30×(1836÷18+18×11) (5)40×(250×88) (6)125×808 (7)32×64-23×64+64 (8)(24+24+24)×25. |
| (1)208×13-3672÷18, =2704-204, =2500; (2)4×505×25, =4×25×505, =100×505, =50500; (3)[332-(32+278)]×186, =[332-32-278]×186, =[300-278]×186, =22×186, =4092; (4)30×(1836÷18+18×11), =30×(102+198), =30×300, =9000; (5)40×(250×88), =40×250×88, =10000×88, =880000; (6)125×808, =125×800+125×8, =100000+1000, =101000; (7)32×64-23×64+64, =(32-23+1)×64, =10×64, =640; (8)(24+24+24)×25, =24×3×25, =4×25×6×3, =100×6×3, =1800. |
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