问题 解答题 口算:3500÷7=0×10÷5=5.4+0.24=62×38≈60×50=0×7+8=5.3-3=440÷9≈ 答案 3500÷7=5000×10÷5=05.4+0.24=5.6462×38≈240060×50=30000×7+8=85.3-3=2.3440÷9≈44故答案为:500,0,5.64,2400,3000,8,2.3,44.