“小马虎”把28×(□+2)错算成28×□+2,这样得到的结果与正确答案相差 .
: =9× =.
5: =20÷16=25: = %= (填小数)
35: =20÷16= %= (填小数)
甲数相当于乙数的,甲数与乙数的比是 ,乙数与甲数的比是 .
÷4== :20= %.