Overview: 7 questions will be solved this time.Among them
           ☆1 inequalities
           ☆1 equations
           ☆1 mathematical statistics
           ☆1 arithmetic calculations
           ☆1 fraction calculations
           ☆1 calculations of prime factor
           ☆1 convert the decimals to fractions

[ 1/7 Equation]
    Work: Find the solution of equation 2x-1 = 0 .
    Question type: Equation
    Solution:Original question:

2

x

−

1

=

0

    Transposition :

2

x

=

0

+

1

    Combine the items on the right of the equation:

2

x

=

1

    The coefficient of the unknown number is reduced to 1 :

x

=

1

÷

2

=

1

×

1 2

    We obtained :

x

=

1 2

    This is the solution of the equation.

    Convert the result to decimal form :

x

=

0.5

[2/7 Formula]
    Work: Calculate the value of equation !(6) .
    Question type: Mathematical calculation
    Solution:
          !(6)
        =720
    Answer:!(6)=720
[ 3/7Inequality]
    Assignment:Find the solution set of inequality ex >1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         e x >1         (1)

---

    From inequality(1)：
         x ＞ 0

---

    The final solution set is :
         x ＞ 0
[ 4/7 Fraction calculation ]
    Question type: Fractional subtraction
    Original question: 1/2-1/5
    Solution:

1 2

－

1 5

    Divide two fractions with defferent denominators:The denominators of two fractions are 2 and 5 respectively,their least common multiple is 10
    Divide the least common multiple 10 by the denominator 2 of the minuend to get 5
    Multiply the numerator 1 and denominator 2 of the subtracted number by 5
    Then divide the least common multiple 10 by the denominator 5 of the subtraction to get 2
    Multiply the subtracted numerator 1 and denominator 5 by 2 at the same time

=

5 10

－

2 10

Calculation result:

=

3 10

[5/7 Digtal analysis]
    Work：Break 1288 into prime factors.
    Question type: Resolving prime factor
    Solution:
        1288=2*2*2*7*23
    *Note: 1288 has 5 prime factors.
[ 6/7 data statistics ]
    Work: Please make statistics on the following data: 1,22,333 。
    Question type: data statistics
        Total data：3
        The sum：356
        Average value：118.66667
        Variance：23042.88889
        Standard deviation：151.79884
    *Note: Totally 5 items are counted.
[ 7/7 Digital analysis ]
    Work: Convert decimal 0.|1 to fractional form.
    Question type: Convert decimal to fraction
    Solution:

0.|1=

1 9

    *Note: Convert circular decimal to fraction.

---

>>注：本次最多计算 7 道题。

Your problem has not been solved here? Please go to the Hot Problems section！