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

Toán Lớp 5: b) 13,25 : 20% + 13,25 : 1,25 – 13,25 : 0,5 cách tính nhanh nhé

Toán Lớp 5: b) 13,25 : 20% + 13,25 : 1,25 – 13,25 : 0,5
cách tính nhanh nhé

Comments ( 2 )

  1. Giải đáp:
    13,25 : 20% + 13,25 : 1,25 – 13,25 : 0,5
    = 13,25 : 1/5 + 13,25 : 5/4 – 13,25 : 1/2
    = 13,25 × 5 + 13,25 × 4/5 – 13,25 × 2
    = 13,25 × ( 5 + 4/5 – 2 )
    = 50,35

  2. 13,25 : 20% + 13,25 : 1,25 – 13,25 : 0,5
    = 13,25 : 1/5 + 13,25 : 5/4 – 13,25 : 1/2
    = 13,25 × 5 + 13,25 × 4/5 – 13,25 × 2
    = 13,25 × ( 5 + 4/5 – 2 )
    = 13,25 × 3,8
    = 50,35
     

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