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

Toán Lớp 5: tính nhanh 1+1/2+1/4+1/8+1/16+1/32

Toán Lớp 5: tính nhanh
1+1/2+1/4+1/8+1/16+1/32

Comments ( 2 )

  1. Giải đáp:
    tính nhanh: 1+1/2+1/4+1/8+1/16+1/32
    =2/2+1/2+1/4+1/8+1/16+1/32
    =(2/2+1/2)+(1/4 + 1/32)+(1/8+1/16)
    =3/2+(8/32+1/32)+(2/16+1/16)
    =3/2+9/32+3/16
    =3/2+(9/32+3/16)
    =3/2+(9/32+6/32)
    =3/2+15/32
    =48/32+15/32
    =63/32
    #congquoc#

  2. Giải đáp:
     58
    Giải thích các bước 
    1+1/2+1/4+1/8+1/16+1/32
    32+8/4+6/1+1/2+1/1+1+1/
    =40+10/2+3/1+1+1
    =50+5+3
    =58

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