38.5×7.4+38.5×2.6 92.85﹣12.65﹣7.65+7.15 800﹣7.06×99﹣7.06
(48.5﹣15)×4.5+66.4×4.5 2004× (+)×15×17.
计算:
①3×(x+9)=27
②16×8﹣7x=23
③7.5﹣7.5×0.5﹣2.6×0.8
④13.7×6.5+5.9×13.7﹣12.4×3.7
⑤50×[(0.2+4.8﹣4.8+0.2)÷2]
⑥11.25+21.25+31.25+41.25+51.25+61.25+71.25+81.25.
试题篮
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