
-3-[-5+(1-0.2x3/5)÷(-2)]x3
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-3-[-5+(1-0.2x3/5)÷(-2)]x3
=-3-[-5+(1-0.12)÷(-2)]x3
=-3-[-5+0.88÷(-2)]x3
=-3-[-5-0.44]x3
=-3+5.44×3
=-3+16.32
=13.32
=-3-[-5+(1-0.12)÷(-2)]x3
=-3-[-5+0.88÷(-2)]x3
=-3-[-5-0.44]x3
=-3+5.44×3
=-3+16.32
=13.32
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