Overview: 6 questions will be solved this time.Among them
           ☆5 arithmetic calculations
           ☆1 fraction calculations

[1/6 Formula]
    Work: Calculate the value of equation 9+99+999+9999+99999 .
    Question type: Mathematical calculation
    Solution:
          9+99+999+9999+99999
        =108+999+9999+99999
        =1107+9999+99999
        =11106+99999
        =111105
    Answer:9+99+999+9999+99999=111105
[ 2/6 Fraction calculation ]
    Question type: Fractional addition
    Original question: 2/3+4/5
    Solution:

2 3

+

4 5

    Divide two fractions with defferent denominators:The denominators of two fractions are 3 and 5 respectively,their least common multiple is 15
    Divide the least common multiple 15 by the denominator 3 of the first addend to get 5
    Multiply the numerator 2 and denominator 3 of the first fraction by 5
    Then divide the least common multiple 15 by the denominator 5 of the second addend to get 3
    Multiply the numerator 4 and denominator 5 of the second fraction by 3

=

10 15

+

12 15

    Calculation result:

=

22 15

[3/6 Formula]
    Work: Calculate the value of equation 999*222+333*334 .
    Question type: Mathematical calculation
    Solution:
          999*222+333*334
        =221778+333*334
        =221778+111222
        =333000
    Answer:999*222+333*334=333000
[4/6 Formula]
    Work: Calculate the value of equation 732066*55555*(4-3.2/0.8) .
    Question type: Mathematical calculation
    Solution:
          732066*55555*(4-3.2/0.8)
        =732066*55555*0
        =40669926630*0
        =0
    Answer:732066*55555*(4-3.2/0.8)=0
[5/6 Formula]
    Work: Calculate the value of equation 1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1 .
    Question type: Mathematical calculation
    Solution:
          1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1
        =3+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1
        =6+4+5+6+7+8+9+8+7+6+5+4+3+2+1
        =10+5+6+7+8+9+8+7+6+5+4+3+2+1
        =15+6+7+8+9+8+7+6+5+4+3+2+1
        =21+7+8+9+8+7+6+5+4+3+2+1
        =28+8+9+8+7+6+5+4+3+2+1
        =36+9+8+7+6+5+4+3+2+1
        =45+8+7+6+5+4+3+2+1
        =53+7+6+5+4+3+2+1
        =60+6+5+4+3+2+1
        =66+5+4+3+2+1
        =71+4+3+2+1
        =75+3+2+1
        =78+2+1
        =80+1
        =81
    Answer:1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1=81
[6/6 Formula]
    Work: Calculate the value of equation 1111*2222+2222*5555+3333*2222 .
    Question type: Mathematical calculation
    Solution:
          1111*2222+2222*5555+3333*2222
        =2468642+2222*5555+3333*2222
        =2468642+12343210+3333*2222
        =2468642+12343210+7405926
        =14811852+7405926
        =22217778
    Answer:1111*2222+2222*5555+3333*2222=22217778

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