心灵脑快．
6.3÷0.9= 0.006×100= 2004﹣299= 11﹣
= 26×0.25×4=
7×
÷7×
= 5÷7+5= 31×197≈ 0.56×
= 
心灵脑快．
6.3÷0.9= 0.006×100= 2004﹣299= 11﹣= 26×0.25×4=
7×÷7×= 5÷7+5= 31×197≈ 0.56×=
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