Simple Arithmetic

In [1]:
from xv.math.kids import Arithmetic as AM
from xv.util import listAttr
In [2]:
help(AM.count)

Help on method count in module xv.math.kids._arithmetic:

count(*args) method of builtins.type instance
In [3]:
AM.count(2, "tiger")
Out[3]:

🐅 1

🐅🐅 2

In [4]:
AM.count(5)
Out[4]:

👧 1

👧👧 2

👧👧👧 3

👧👧👧👧 4

👧👧👧👧👧 5

In [5]:
AM.count(1, 5)
Out[5]:

👧 1

👧👧 2

👧👧👧 3

👧👧👧👧 4

👧👧👧👧👧 5

In [6]:
AM.count(-5, 1)
Out[6]:

-5

-4

-3

-2

-1

0

👧 1

In [7]:
AM.add(45,- 20)
Out[7]:

45 - 20

= (40 + 5) + (-20)

= 40 - 20 + 5

= 20 + 5

= 20 + 5

= 25

In [8]:
AM.multiply(30, 29)
$\displaystyle 30 * 29$ 
Flip to keep smaller number (absolute values) first
$\displaystyle 29 * 30$ 
Expand numbers
$\displaystyle (20 + 9) * 30$ 
Distribute multiplier
$\displaystyle 20 * (30) + 9 * (30)$ 
Sort
$\displaystyle 600 + 270$ 
Answer
$\displaystyle 870$
In [9]:
AM.lcm(4, 5, 4)

Calculating LCM of 4, 5, 4

Multiples of 4 = [ 4  8 12 16 20]

Multiples of 5 = [ 5 10 15 20]

Multiples of 4 = [ 4  8 12 16 20]

The lowest common multiple (LCM) of all numbers 20
Out[9]:
20
In [10]:
AM.addInMemory(36, 35)
Out[10]:

+ 36 + 35

+ 30 + 6 + 30 + 5

+ 60 + 6 + 5

+ 71

In [11]:
AM.prime(28)

Finding 5 prime numbers >= 28

Is 28 a prime number?
Square root of 28 is less than 6.
The prime numbers smaller than 6 are:
[2, 3, 5]
So, we will check whether 28 is divisible by any of the above prime numbers
As 28 is divisible by 2, it is not a prime number.

Is 29 a prime number?
Square root of 29 is less than 6.
The prime numbers smaller than 6 are:
[2, 3, 5]
So, we will check whether 29 is divisible by any of the above prime numbers

29 is a prime number.
It is not divisible by prime numbers less than or equal to its square root 5.4:
[2, 3, 5]

Is 30 a prime number?
Square root of 30 is less than 6.
The prime numbers smaller than 6 are:
[2, 3, 5]
So, we will check whether 30 is divisible by any of the above prime numbers
As 30 is divisible by 2, it is not a prime number.

Is 31 a prime number?
Square root of 31 is less than 6.
The prime numbers smaller than 6 are:
[2, 3, 5]
So, we will check whether 31 is divisible by any of the above prime numbers

31 is a prime number.
It is not divisible by prime numbers less than or equal to its square root 5.6:
[2, 3, 5]
....

37 is a prime number.
It is not divisible by prime numbers less than or equal to its square root 6.1:
[2, 3, 5]
....

41 is a prime number.
It is not divisible by prime numbers less than or equal to its square root 6.4:
[2, 3, 5]
....

43 is a prime number.
It is not divisible by prime numbers less than or equal to its square root 6.6:
[2, 3, 5]
Finding 5 prime numbers >= 28
$\displaystyle [29, 31, 37, 41, 43]$
Out[11]:
[29, 31, 37, 41, 43]
In [ ]:

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