解:300÷7约等于( 42.86 ) ∵已知需求出300÷7等于多少 X ÷ Y = X / Y = Z ∴300 ÷ 7 = 300 × 1/7 = 300/7 = 42.85714286 ≈ 42.86 答:300÷7约等于42.86
300÷7=40......20