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(5.2-4.6)x4.25-0.8简算怎样算?

(5.2-4.6)x4.25-0.8 =0.6x4.25-0.8 =2.55-0.8 =1.7

解:(5.2-4.6)x4.25-0.8 =0.6x4.25-0.6-0.2 =0.6x3.25

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