(1)72+28×108 (2)36×64-64+64×65 (3)24×125×7 (4)25×(24+8)×125 (5)402×[494
(1)72+28×108(2)36×64-64+64×65(3)24×125×7(4)25×(24+8)×125(5)402×[494÷(102-83)](6)908-8...
(1)72+28×108 (2)36×64-64+64×65 (3)24×125×7 (4)25×(24+8)×125 (5)402×[494÷(102-83)] (6)908-8×(73-46)
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(1)72+28×108, =72+3024, =3096; (2)36×64-64+64×65, =(36-1+65)×64, =100×64, =6400,; (3)24×125×7, =3×8×125×7, =(3×7)×(8×125), =21×1000, =21000; (4)25×(24+8)×125, =25×32×125, =25×4×8×125, =(25×4)×(8×125), =100×1000, =100000; (5)402×[494÷(102-83)], =402×[494÷19], =402×26, =10452; (6)908-8×(73-46), =908-8×27, =908-216, =692. |
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