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.
(78.6﹣0.786×25十75%×21.4)÷15×1997
8888008×125
2001×3.14+200.1×31.4+20.01×314
0.525÷13.125÷4×85.2.
6.4×2.5+2×3.4+25% 15.7×7.7+1.57×22+1.57
12.56﹣(+2.56+) ×﹣×
2010× 3.65÷〔0.1÷(2.1﹣2.09)〕
试题篮
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