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285.6÷25竖式计算

如图

285.6÷(5905÷0.25) =285.6÷23620 ≈0.012

=47.5+37x4-27 =47.5-27+148 =20.5+148 =168.5

285÷6 =285÷3÷2 =95÷2 =47.5

解: (324一285)x12÷6 =39x(12÷6) =39x2 =78

285+6.2+115+23.8 =(285+115)+(6.2+23.8) =400+30 =430 望采纳,谢谢!

285.6的平方根约等于±16.9

287+746=1033验算:51÷9=5…6800-285=515验算:408×8=3264530×6=3180235×7=1645

求整个跑道的面积,少个跑道宽度,设为a米 285.6x2xa+π((80+a)^2一80^2)x2 =571.2a+π(320a+2a^2)cm^2 将a代入即可

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