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脱式计算(1)6760÷13+17×25(2)4.82%5.2÷0.8×0.6...

13×17×(2/13-0.125)÷7/6÷(1-1/2-1/8) =13×17×(2/13-1/8)×6/7÷3/8 =17×(2/13×13-1/8×13)×6/7×8/3 =17×(2-13/8)×16/7 =17×3/8×16/7 =102/7

(1)7.4×9.8-14.5 =7.4×(10-0.2)-14.5 =7.4×10-7.4×0.2-14.5 =74-1.48-14.5 =58.02 (3)13.4+5.62+17.6+4.38 =(13.4+17.6)+(5.62+4.38) =31+10 =41 (3)6.73×4.8+5.2×6.73 =6.73×(4.8+5.2) =6.73×10 =67.3 (4)8.4÷0.6+8.4÷0.4 =84...

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