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

Toán Lớp 6: 23,15 . 5,7 + 23,15 . 4,3 – 131,5 tính nhanh 2 phút

Toán Lớp 6: 23,15 . 5,7 + 23,15 . 4,3 – 131,5
tính nhanh
2 phút

Comments ( 2 )

  1. 23,15 . 5,7 + 23,15 . 4,3 – 131,5
    = 23,15 . ( 5,7 + 4,3 ) – 131,5
    = 23,15 . 10 – 131,5
    = 231,5 – 131,5
    = 100 

  2. 23,15 . 5,7 + 23,15 . 4,3 – 131,5
    = 23,15 . (5.7 + 4,3) – 131,5
    = 23,15 . 10 – 131,5
    = 231,5 – 131,5
    = 100
     

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