Overview: 3 questions will be solved this time.Among them
           ☆1 equations
           ☆1 arithmetic calculations
           ☆1 convert the decimals to fractions

[1/3 Formula]
    Work: Calculate the value of equation 2^2/(2*2) .
    Question type: Mathematical calculation
    Solution:
          2^2/(2*2)
        =2^2/4
        =4/4
        =1
    Answer:2^2/(2*2)=1
[ 2/3 Digital analysis ]
    Work: Convert decimal 0.3|2 to fractional form.
    Question type: Convert decimal to fraction
    Solution:

0.3|2=

29 90

    *Note: Convert circular decimal to fraction.
[ 3/3 Equation]
    Work: Find the solution of equation arc(-1) = 0 .
    Question type: Equation
    Solution:Original question:

a

(

-

1

)

=

0

    Remove the bracket on the left of the equation:

Left side of the equation =

-

a

×

1

    The equation is transformed into :

-

1

a

=

0

    i.e.

-

a

=

0

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

-

0

=

a

    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 :

a

=

-

0

    This is the solution of the equation.
    This is the solution of the equation.

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