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

Toán Lớp 5: a,X+1/2 xX=4/5 b, Xx2+Xx1/5=1 1/3

Home/ Toán Lớp 5: a,X+1/2 xX=4/5 b, Xx2+Xx1/5=1 1/3

Toán Lớp 5: a,X+1/2 xX=4/5 b, Xx2+Xx1/5=1 1/3

Tháng Tám 17, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: a,X+1/2 xX=4/5
b, Xx2+Xx1/5=1 1/3

Comments ( 2 )

  1. truongthanhhung
    truongthanhhung
    17 Tháng Tám, 2022 at 3:21 sáng
    Reply
    Giải đáp:
    a. X= 8/15
    b. X= 20/33
    a,= X x 1 + X x 1/2= X x 3/2 = 4/5, X=4/5 : 3/2 = 8/15
    b,= X x 11/5 = 1/3=1/3 : 11/5 = 20/33
    @baonguyen78@
    chúc bạn học tốt

  2. kimlien
    kimlien
    17 Tháng Tám, 2022 at 3:21 sáng
    Reply
    $a) x+ \dfrac{1}{2}×x=\dfrac{4}{5}^{}$
    $⇒x×(\dfrac{1}{2}+1)=\dfrac{4}{5}^{}$
    $⇒x×\dfrac{3}{2}=\dfrac{4}{5}^{}$
    $⇒x =\dfrac{4}{5}:\dfrac{1}{2}^{}$
    $⇒x=\dfrac{8}{5}^{}$
    $b) x × 2+x×\dfrac{1}{5}=1\dfrac{1}{3}^{}$
    $⇒ x ×(\dfrac{1}{5}+2)=\dfrac{4}{3}^{}$
    $⇒ x ×\dfrac{11}{5}=\dfrac{4}{3}^{}$
    $⇒ x=\dfrac{4}{3}:\dfrac{11}{5}^{}$
    $⇒ x=\dfrac{20}{33}^{}$
     

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

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