python script for mental math exercices

calc.py

import random
import subprocess


def ab_biggerthan_ten():
    # Generate 2 number sum of which <= 10
    a = (random.randint(1,9))
    rmin = 10-a
    rmax = 9
    b = (random.randint(rmin, rmax))
    #print(a,"-",b)
    return a,b


def rounded_ten():
    # Generate rounded 10th number
    ra = (random.randint(20, 99))
    modrest = ra % 10
    rounded = ra - modrest
    return rounded


def check(answer, result):
    if answer == result:
        print("Good!!")
    else:
        print("Oops!! Verifiez votre reponse: le resultat est ", result)

def func_compl(frank):
    fnbr=random.randint(frank/10, frank-1)
    frez = frank - fnbr
    return fnbr, frank, frez

def carryon():
    carry = input('<Entrer> pour continuer ...')
    if carry == '':
        return True
    else:
        return False


def compl_question(n1, n2, n3):
    subprocess.run("clear")
    print("Trouvez le complementaire de ", n1, "jusqu\'a", n2)
    answer = ''
    while not answer.isdigit():
        answer = input('==> ')
    check(int(answer), n3)


def comp():
    ##### menu compl
    check_exit = True
    while check_exit:
        nbr, rank, rez = func_compl(1000)
        compl_question(nbr, rank, rez)
        check_exit = carryon()


def gen_XX_X():
    subprocess.run("clear")
    x, y = ab_biggerthan_ten()
    decimal = rounded_ten()
    a = decimal + x
    b = y
    print(a)
    print("+")
    print(str(b).rjust(2,' '))
    return a, b


def gen_XX_XX():
    subprocess.run("clear")
    x, y = ab_biggerthan_ten()
    decimal1 = rounded_ten()
    decimal2 = rounded_ten()
    a = decimal1 + x
    b = decimal2 + y
    print(a)
    print("+")
    print(str(b).rjust(2,' '))
    return a, b


def add_XX_X():
    check_exit = True
    while check_exit:
        a, b = gen_XX_X()
        ans_add = input("> ")
        while not ans_add.isdigit():
            ans_add = input('> ')
        check(int(ans_add), a + b)
        check_exit = carryon()


def add_XX_XX():
    check_exit = True
    while check_exit:
        a, b = gen_XX_XX()
        ans_add = input("> ")
        while not ans_add.isdigit():
            ans_add = input('> ')
        check(int(ans_add), a + b)
        check_exit = carryon()

ans = True
while ans:
    subprocess.run("clear")
    print("""
    1.Complementaires
      Addition
        2. XX+X
        3. XX+XX
    9.Exit/Quit
    """)
    ans = input("> ")
    if ans == "1":
        comp()
    elif ans == "2":
        add_XX_X()
    elif ans == "3":
        add_XX_XX()
    elif ans == "9":
        exit()
    else:
        pass