Need to make negative number recognise as a int, float, isnumeric or isdigit

I need vastus to be recognised as a number, or int or float type. So if i input vastus as -2 it goes to else statment but i need it to go to if statment. When i type any negative number it is recognised as a str. If there is any better way to slove it i would appriciate the help. I tried google and got nothing, still a total noob.

vastus = (input("Vastus:"))
            print (type(vastus))
            if vastus.isnumeric():
                if float(vastus) == (a+b):
                    print ("Õige vastus")
                    tulemus = tulemus + 1
                    arv = arv + 1
                else:
                    print ("Vale vastus, õige vastus on" ,(a+b))
                    arv = arv + 1
            else:
                print ("Peate sisestama arvu")