Overview: 4 questions will be solved this time.Among them
           ☆1 equations
           ☆2 calculations of prime factor
           ☆1 convert the decimals to fractions

[ 1/4 Digital analysis ]
    Work: Convert decimal 4.376096 to fractional form.
    Question type: Convert decimal to fraction
    Solution:

4.376096=

136753 31250

    *Note: Convert finite decimal to fraction.
[2/4 Digtal analysis]
    Work：Break 3760832 into prime factors.
    Question type: Resolving prime factor
    Solution:
        3760832=2*2*2*2*2*2*58763
    *Note: 3760832 has 7 prime factors.
[3/4 Digtal analysis]
    Work：Break 19767728 into prime factors.
    Question type: Resolving prime factor
    Solution:
        19767728=2*2*2*2*53*23311
    *Note: 19767728 has 6 prime factors.
[ 4/4 Equation]
    Work: Find the solution of equation 30-18x = 11-2x+7-20 .
    Question type: Equation
    Solution:Original question:

30

−

18

x

=

11

−

2

x

+

7

−

20

Right side of the equation =

-

2

−

2

x

    The equation is transformed into :

30

−

18

x

=

-

2

−

2

x

    Transposition :

-

18

x

+

2

x

=

-

2

−

30

    Combine the items on the left of the equation:

-

16

x

=

-

2

−

30

    Combine the items on the right of the equation:

-

16

x

=

-

32

    By shifting the terms and changing the symbols on toth sides of the equation, we obtain :

32

=

16

x

    If the left side of the equation is equal to the right side, then the right side must also be equal to the left side, that is :

16

x

=

32

    The coefficient of the unknown number is reduced to 1 :

x

=

32

÷

16

=

32

×

1 16

=

2

×

1

    We obtained :

x

=

2

    This is the solution of the equation.

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