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

Toán Lớp 5: 28 + 62 x a +a x (a x 1 – a : 1 ) + 28 x 8 + 28

Toán Lớp 5: 28 + 62 x a +a x (a x 1 – a : 1 ) + 28 x 8 + 28

Comments ( 2 )

  1. mk gửi nhé
    Giải đáp: 62 x a +280
    Lời giải và giải thích chi tiết:
    28 + 62 x a +a x (a x 1 – a : 1 ) + 28 x 8 + 28
    = 28 + 62 x a +a x 0 + 28 x 8 + 28
    = 28 + 62 x a + 0 + 28 x 8 + 28
    = 28 + 62 x a + 224 + 28
    = 62 x a + 28 + 224 + 28
    = 62 x a +280

  2. 28 + 62 × a + a × ( a × 1 – a : 1 ) + 28 × 8 + 28
    = 28 × 1 + 62 × a + a × ( a – a ) + 28 × 8 + 28 × 1
    = 28 × ( 1 + 8 + 1 ) + 62 × a + a × 0
    = 28 × 10 + a × ( 62 + 0 )
    = 280 + a × 62
    #dtkc
     

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