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| (1)35×(26÷2+7), =35×(13+7), =35×20, =700; (2)400÷[480÷(16+8)], =400÷[480÷24], =400÷20, =20; (3)78×26+26×22, =(78+22)×26, =100×26, =2600; (4)57×101-57, =57×(101-1), =57×100, =5700; (5)125×(8+4), =125×8+125×4, =1000+500, =1500; (6)(86+19)×(95-69), =105×26, =(100+5)×26, =100×26+5×26, =2600+130, =2730. |
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