解:582÷28约等于( 20.79 ) ∵已知需求出582÷28约等于多少 A ÷ B = A/B = C ∴582 ÷ 28 = 582/28 = 291/14 = 20.78571429 ≈ 20.79 答:582÷28约等于20.79
约等于21
如图所示!