2x8.1+11x9.25+537x0.
题目
2x8.1+11x9.25+537x0.
答案
41.2x8.1+11x9.25+537x0.19=41.2x8.1+11x9.25+53.7x1.9=41.2x8.1+11x(8+1.25)+(41.2+12.5)x1.9=41.2×8.1+41.2×1.9+11×8+11×1.25+12.5×1.9=41.2×(8.1+1.9)+11×8+11×1.25+1.25×19=41.2×10+...
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