问四道奥数计算题
①15\7×[1.6+1/9÷0.84-1(7/18)]②4/9×22(8/15)+16×1/9+2/9×4/15③{2.25+[3(3/5)-1.21×5/11]}÷4...
①15\7×[1.6+1/9÷0.84-1(7/18)]
②4/9×22(8/15)+16×1/9+2/9×4/15
③{2.25+[3(3/5)-1.21×5/11]}÷40%
④1999÷1999(1999/2000)+1/2001
要过程 展开
②4/9×22(8/15)+16×1/9+2/9×4/15
③{2.25+[3(3/5)-1.21×5/11]}÷40%
④1999÷1999(1999/2000)+1/2001
要过程 展开
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