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

Toán Lớp 6: Bài 1: Tính nhanh a) 58.75 + 58.50 – 58.25 b) 27.39 + 27.63 – 2.27 c) 128.46 + 128.32 + 128.22 d) 66.25 + 5.66 + 66.14 + 33.66 e) 12.35

Toán Lớp 6: Bài 1: Tính nhanh
a) 58.75 + 58.50 – 58.25
b) 27.39 + 27.63 – 2.27
c) 128.46 + 128.32 + 128.22
d) 66.25 + 5.66 + 66.14 + 33.66
e) 12.35 + 35.182 – 35.94
f) 35.23 + 35.41 + 64.65
g) 29.87 – 29.23 + 64.71

Comments ( 2 )

  1. a) 58 . 75 + 58 . 50 – 58 . 25
    = 58 . ( 75 + 50 – 25)
    = 58 .  100
    = 5800
    b) 27 . 39 + 27 . 63 – 2 . 27
    = 27 . ( 39 + 63 – 2)
    = 27 . 100
    = 2700
    c) 128 . 46 + 128 . 32 + 128 . 22
    = 128 . ( 46 + 32 + 22)
    = 128 . 100
    = 12800
    d) 66 . 25 + 5 . 66 + 66 . 14 + 33 . 66
    = 66 . ( 25 + 5 + 14 + 33)
    = 66 . 77
    = 5082
    e) 12 . 35 + 35 . 182 – 35 . 94
    = ( 12 + 182 – 94) . 35
    = 100 . 35
    = 3500
    f) 35 . 23 + 35 . 41 + 64 . 65
    = 35 . (23 + 41) + 64 . 65
    = 35 . 64 + 64 . 65
    = ( 35 + 65) . 64
    = 100 . 64
    = 6400
    g) 29 . 87 – 29 . 23 + 64 . 71
    = 29 . ( 87 – 23) + 64 . 71
    = 29 . 64 + 64 . 71
    = ( 29 + 71) . 64
    = 100 . 64
    = 6400
    #caty09

  2. Giải đáp + Lời giải và giải thích chi tiết 
    a) 58 × 75 + 58 × 50 – 58 × 25
    =58×(75+50-25)
    =58×100
    =5800
    b)27×39+27×63-2×27
    =27×(39+63-2)
    =27×100
    =2700
    c)128.46 + 128.32 + 128.22
    =128×(46+32+32)
    =128×100
    =12800
    d) 66.25 + 5.66 + 66.14 + 33.66
    =66×(25+5+14+33)
    =66×77
    =5082
    e)12.35 + 35.182 – 35.94
    =35×(182+12-94)
    =35×100
    =3500
    f) 35.23 + 35.41 + 64.65
    =35×(23+41)+64×65
    =35×64+64×65
    =64×(35+65)
    =64×100
    =6400
    g) 29.87 – 29.23 + 64.71
    =29×(87-23)+64×71
    =29×64+64×71
    =64×(29+71)
    =64×100
    =6400
    Xin câu trả lời hay nhất ạ !
     

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