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

Toán Lớp 6: Tính nhanh : 456 : 2 x 18 + 456 : 3 – 102

Toán Lớp 6: Tính nhanh :
456 : 2 x 18 + 456 : 3 – 102

Comments ( 2 )

  1. 456 : 2 . 18 + 456 : 3 – 102
    = 456. 0,5.18 + 456 . 1/3 – 102
    = (456. 9 + 456 . 1/3) – 102
    = 456.(9 + 1/3) – 102
    = 456. 28/3 – 102
    = 4256 – 102
    = 4154
     

  2. $\\$
    456 ÷ 2×18 + 456 ÷ 3 – 102
    = 456 × 1/2 × 18 + 456× 1/3 – 102
    = 456 × 9 + 456 × 1/3 – 102
    = 456 × (9 + 1/3) – 102
    = 456 × (27/3 + 1/3)  – 102
    = 456 × 28/3 – 102
    = 4256 – 102
    = 4154
     

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

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