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

Toán Lớp 4: rút gọn phân số 200 / 100 248 / 657 bài 2 : tìm x X x 8658 = 60606 X : 75487657 = 7

Toán Lớp 4: rút gọn phân số
200 / 100
248 / 657
bài 2 : tìm x
X x 8658 = 60606
X : 75487657 = 7

Comments ( 2 )

  1. 1)
    200/100
    =(200:100)/(100:100)
    =2
    248/658
    =(248:2)/(658:2)
    =124/329
    2)
    x×8658=60606
    x=60606:8658
    x=7
    Vậy x=7
    x:75487657=7
    x=7×75487657
    x=528413599
    Vậy x=528413599

  2. Rút gọn phân số:
    $\dfrac{200}{100}$ =$\dfrac{200:100}{100:100}$ =$\dfrac{2}{1}$ =$2$
    $\dfrac{248}{658}$ = $\dfrac{248:2}{658:2}$ =$\dfrac{124}{329}$ 
    Bài 2:Tìm x
    $Xx8658=60606$
    $X =60606:8658$
    $X=7$
    Vậy x=7
    $x:75487657=7$
    $x=7×75487657$
    $x=528413599$
    Vậy x=528413599

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