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试题原文 |
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(1)79.76+84.7×0.2, =79.76+16.94, =96.7; (2)15.37+28.44+12.56, =15.37+(28.44+12.56), =15.37+41, =56.37; (3)(2.3×8.8-2.3×0.8)×1.25, =2.3×(8.8-0.8)×1.25, =2.3×8×1.25, =2.3×(8×1.25), =2.3×10, =23; (4)[5.2-(2.5+7.5÷5)]×1.2, =[5.2-(2.5+1.5)]×1.2, =[5.2-4]×1.2, =1.2×1.2, =1.44. |
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