问题 填空题 甲数是乙数的45,甲数是乙数的______%;乙数是甲数的______%,甲数是甲乙两数和的______%. 答案 设甲数为4,乙数为5,4÷5=0.8=80%,5÷4=1.25=125%,4÷(4+5),=4÷9,≈0.444,=44.4%,故答案为:80,125.44.4.