Help for teach math program

import random

def reset_variables():
    right = 0
    wrong = 0

reset_variables()

def ask_for_integer(ask):
    while True:
        answer = raw_input(ask)
        if not answer.isdigit():
            print "Please enter a number."
        else:
            return int(answer)

# Addition game
def play_one_Addition_game():
    global right 
    global wrong
    
    # Get random numbers to quiz user
    rand_one = random.randrange(1,10)
    rand_two = random.randrange(1,10)
    
    # Get the answer
    answer = rand_one + rand_two
    
    reply = ask_for_integer("What is " + str(rand_one) + " plus " + str(rand_two) + "?")
      
    if reply == answer:
        print "YOu rock"
        right +=1
    else:
        print "You got it wrong, YOu suck"
        print "The answer is " + str(answer)
        wrong +=1

# Print out menu for user
def print_menu():
    print "1. addition"
    print "2. subtraction"
    print "5. exit"
    
    # fill in rest
    
# Find out what game user wants to play, and play it
def ask_for_operation():
    while True:
        print_menu()
        reply = ask_for_integer("What would you like to play?")

if reply == 1:
            for game_num in range(0,10):  
                play_one_Addition_game()
    
        elif reply == 2:
            play_Subtraction_game()
   
        elif reply == 3:
            play_Multiplacation_gmae()
        
        elif reply == 4: 
            play_Division_game()
        elif reply == 5:
            print "thx for playin"
            break
        else:
            # I don't know what to do!
            print "Choose 1, 2, 3, 4 or 5 to exit"
            
        print "You got " + str(right) + " correct and " + str(wrong) + " wrong."
        # Game is over now
        # Reset variables
        reset_variables()
        
ask_for_operation()

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