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

Toán Lớp 5: tính a, 1 + 1/4 + 1/8 + 1/16 b, 2 – 1/8 – 1/12 – 1/16 c, 4/99 x 18/5 : 12/11 + 3/5 d, ( 1 – 3/4 ) x ( 1 + 1/3 : ( 1 – 1/3 )

Tháng Sáu 14, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: tính
a, 1 + 1/4 + 1/8 + 1/16
b, 2 – 1/8 – 1/12 – 1/16
c, 4/99 x 18/5 : 12/11 + 3/5
d, ( 1 – 3/4 ) x ( 1 + 1/3 : ( 1 – 1/3 )

Comments ( 2 )

  1. tuyen98
    tuyen98
    14 Tháng Sáu, 2022 at 9:41 chiều
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
     a, 1 + 1/4 + 1/8 + 1/16
     = 16/16 + 4/16 + 2/16 + 1/16
     = 16 + 4+2+1/16
     = 23/16
    b, 2 – 1/8 – 1/12 – 1/16
     = 96/48 – 6/48 – 4/48 – 3/48
     = 96 – 6 – 4 – 3/48
     = 83/48
    c, 4/99 x 18/5 : 12/11 + 3/5
     = 4/99 x 18/5 × 11/12 + 3/5
     = 2/15 + 3/5
     = 11/15
    d, ( 1 – 3/4 ) x ( 1 + 1/3) : ( 1 – 1/3 )
     =  1/4 × 4/3 : 2/3
     =  1/4 × 4/3 × 3/2
     =  1/2

  2. kimlien
    kimlien
    14 Tháng Sáu, 2022 at 9:41 chiều
    Reply
    a, 1 + 1/4 + 1/8 + 1/16
    = 1/1 + 1/4+ 1/8+ 1/16
     = 16/16 + 4/16 + 2/16 + 1/16
     =$\dfrac {16 + 4+2+1}{16}$
     = 23/16
    b, 2 – 1/8 – 1/12 – 1/16
    =2/1-1/8-1/12-1/16
    = 96/48 – 6/48 – 4/48 – 3/48
    =$\dfrac{96-6-4-3}{48}$  
     = 83/48
    c, 4/99 x 18/5 : 12/11 + 3/5
     = 4/99 x 18/5 × 11/12 + 3/5
     = 2/15 + 3/5
     = 11/15
    d, ( 1 – 3/4 ) x ( 1 + 1/3) : ( 1 – 1/3 )
     =  1/4 × 4/3 : 2/3
     =  1/4 × 4/3 × 3/2
     =  1/2

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

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