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

Toán Lớp 5: 3 và 3/4 – 2,25 -1/4 A.1,52 B.1,25 C.2,15 D.2,51

Toán Lớp 5: 3 và 3/4 – 2,25 -1/4
A.1,52 B.1,25 C.2,15 D.2,51

Comments ( 2 )

  1. 3\frac{3}{4}-2,25-\frac{1}{4}
    =\frac{15}{4}-2,25-\frac{1}{4}
    =3,75-2,25-0,25
    =3-75-(2,25+0,25)
    =3,75-2,5
    =1,25
    =>\text{Chọn B}

  2. 33/4 – 2,25 – 1/4
    = 15/4 – 9/4 – 1/4
    = 5/4
    = 1,25
    -> Chọn B

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