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

Toán Lớp 5: 4) Tính: d/ 2 5 a) (10: x) 3  ….……………………………………………. ……. ….……………………………………………. ……. ….…………………………………………………… ……………………………………………………… ……………………

Toán Lớp 5: 4) Tính:
d/ 2
5
a) (10: x) 3 
….……………………………………………. …….
….……………………………………………. …….
….……………………………………………………
………………………………………………………
……………………………………………………….
5) Tìm x:
d/ 25,63 – x =1, 63 + 4,12
….……………………………………………. ……..
….……………………………………………. ……..
….……………………………………………………
……………………………………………………….
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Comments ( 2 )

  1. Giải đáp:
    4, 5.2=10
    5, (10/x)=3
    =3.10=30
    5,d,  25,63-x=1,63+4,12
    =x=3,75+25,63
    =x=29,38
     

  2. a)
    (10:x)xx3/5 =2
    (10:x) =2:3/5
    (10:x) =2xx5/3
    10:x=10/3
    x=10:10/3
    x=10xx3/10
    x=3
    Vậy x=3
    d)
    25,63-x=1,63+4,12
    25,63-x=5,75 
    x=25,63-5,75
    x=19,88
    Vậy x=19,88

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

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