Training passing ten in addition and substraction

By Tony Veijalainen on Jul 12th, 2011 4:39 pm

Python helps in real life situation to automate things. This program helps you to prep up your kids ability to go over/under ten, which is essential not only by itself, but also when calculating with bigger numbers.

Program is not any special, but shows how useful Python can be in real life situations.

from __future__ import print_function
import random

def exercises(count, perline=3, width=80):
    print((width*'=').join('\n\n'))
    w = width / perline
    for i in range(count):
        if not i % perline:
            print('\n\n')
        a = random.randint(1,9)
        c = random.randint(10,10+a-1)
        b = c-a
        case = random.randint(0,5)
        if case == 0:
            ex = '%2i - %2i = ______'.ljust(w) % (c, a)
        elif case == 1:
            ex = '%2i + %2i = ______'.ljust(w) % (a, b)
        elif case == 2:
            ex = '%2i + ______ = %2i'.ljust(w) % (a, c)
            
        elif case == 3:
            ex = '%2i - ______ = %2i'.ljust(w) % (c, b)
        elif case == 4:
            ex = '______ - %2i = %2i'.ljust(w) % (a, b)           
        else:
            ex = '______ + %2i = %2i'.ljust(w) % (a, c)
        print(ex, end= '')
    print()    
    print((width*'=').join('\n\n'))
          
exercises(int(raw_input('How many exercises? ')))

10 Months Ago

New day, new exercises. The program is easy to change for practising multiplication/division in upto 10*10 region. Same exercise might repeat, but it is too much trouble to check for that. If you must check, you should generate all possible exercises and take random.choice from that, removing each used one as you print.

from __future__ import print_function
import random

def exercises(count, perline=3, width=80):
    print((width * '=').join('\n\n'))
    w = width / perline
    for i in range(count):
        if not i % perline:
            print('\n\n')
        a = random.randint(1,9)
        b = random.randint(1,9)
        c = a * b
        case = random.randint(0,5)

        if case == 0:
            ex = '%2i / %2i = ______'.ljust(w) % (c, a)
        elif case == 1:
            ex = '%2i * %2i = ______'.ljust(w) % (a, b)
        elif case == 2:
            ex = '%2i * ______ = %2i'.ljust(w) % (a, c)
            
        elif case == 3:
            ex = '%2i / ______ = %2i'.ljust(w) % (c, b)
        elif case == 4:
            ex = '______  / %2i = %2i'.ljust(w) % (a, b)           
        else:
            ex = '______  * %2i = %2i'.ljust(w) % (a, c)
        print(ex, end= '')
    print()    
    print((width * '=').join('\n\n'))
          
exercises(int(raw_input('How many exercises? ')))

pyTony

pyMod

Moderator

5,359 posts since Apr 2010

Reputation Points: 782

Solved Threads: 852

This article has been dead for over three months

You