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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: tìm x x + 7 4/5 = 9 7/15 x – 4 9/11 = 2121/2222

Home/ Toán Lớp 5: tìm x x + 7 4/5 = 9 7/15 x – 4 9/11 = 2121/2222

Toán Lớp 5: tìm x x + 7 4/5 = 9 7/15 x – 4 9/11 = 2121/2222

Tháng Chín 10, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: tìm x
x + 7 4/5 = 9 7/15 x – 4 9/11 = 2121/2222

Comments ( 2 )

  1. mocmien87
    mocmien87
    10 Tháng Chín, 2022 at 6:53 sáng
    Reply
    x + 7$\frac{4}{5}$ = 9$\frac{7}{15}$
    x + $\frac{39}{5}$ = $\frac{142}{15}$
                      x        = $\frac{142}{15}$ – $\frac{39}{5}$
                    x          = $\frac{142}{15}$ – $\frac{117}{15}$
                        x      =            $\frac{25}{15}$
                        x      =            $\frac{5}{3}$
    x – 4$\frac{9}{11}$ = $\frac{2121}{2222}$
    x – $\frac{53}{11}$ = $\frac{21}{22}$
              x                  = $\frac{21}{22}$ + $\frac{53}{11}$ 
              x                  = $\frac{21}{22}$ + $\frac{106}{22}$ 
               x                 = $\frac{127}{22}$ 
    Lunangoctrang1

  2. maitrucloan
    maitrucloan
    10 Tháng Chín, 2022 at 6:52 sáng
    Reply
    text{#Paow}
    a,x+7$\dfrac{4}{5}$=9$\dfrac{7}{15}$
    x+$\dfrac{39}{5}$=$\dfrac{142}{15}$
    ->x=$\dfrac{142}{15}$-$\dfrac{39}{5}$
    x=$\dfrac{142}{15}$-$\dfrac{117}{15}$
    x=$\dfrac{5}{3}$
    => Vậy x có giá trị là$\dfrac{5}{3}$
    b,x-4$\dfrac{9}{11}$=$\dfrac{2121}{2222}$
    x-$\dfrac{53}{11}$=$\dfrac{21}{22}$
    ->x=$\dfrac{21}{22}$+$\dfrac{53}{11}$
    x=$\dfrac{21}{22}$+$\dfrac{106}{22}$
    x=$\dfrac{127}{22}$
    =>Vậy x có giá trị là $\dfrac{127}{22}$
     

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222-9+11+12:2*14+14 = ? ( )

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