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脱式计算. (1)45×(67+43) (2)3.68...

(1)45×(67+43)=45×110=4950;(2)3.68÷4.6+6.32=0.8+6.32=7.12;(3)72÷59×514=72×95×514=94;(4)1.8×(4.7-3.87÷0.9)=1.8×(4.7-4.3)=1.8×0.4=0.72;(5)15+(14-310×23)=15+(14-15)=15-15+14=14;(6)36÷[(56-13)×3]=36÷[12×...

45*(67+43) =45×110 =45×(100+10) =4500+450 =4950 3.68÷4.6+6.32 =0.8+6.32 =7.12 7/2÷5/9*5/14 =7/2×9/5×5/14 =1/2×9×1/2 =9/4 1.8*(4.7-3.87÷0.9) =1.8×4.7-3.87×1.8÷0.9 =1.8×4.7-4.3×0.9×2 =1.8×(4.7-4.3) =1.8×0.4 =0.72 1/5+(1/...

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