Displaying numbers on iPhone keyboard

On the keyboard, look at the bottom left and see the 123 button. Tap it and you'll get numbers.

miramm wrote:

I need to show numbers on keyboard

If you want them on the top level, you need to get a different keyboard from the app store. Have a look at Swiftkey, Bullkey, Number Row Keyboard, Fleksy, My Keyboard Custom Keyboard.