(1)51.27-8.66-1.34, =51.27-(8.66+1.34), =51.27-10, =41.27; (2)88×125, =11×8×125, =11×(8×125), =11×1000, =11000; (3)28.4-3.96-1.04+4.6, =(28.4+4.6)-(3.96+1.04), =33-5, =28; (4)64×64+36×64, =64×(64+36), =64×100, =6400; (5)58×99, =58×(100-1), =58×100-58×1, =5800-58, =5742; (6)35×4×25×20, =(35×20)×(4×25), =700×100, =70000.
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