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

Toán Lớp 6: Tính nhanh: a)52.143-52.39-8.26 b)69+207-46

Toán Lớp 6: Tính nhanh:
a)52.143-52.39-8.26
b)69+207-46

Comments ( 2 )

  1. Giải đáp:
     a) 5200
     b) 230
    Lời giải và giải thích chi tiết:
    text{a) 52.143 – 52.39 – 8.26}
    text{= 52.143 – 52.39 – 4.( 2.26 )}
    text{= 52.143 – 52.39 – 4.52}
    text{= 52. ( 143 – 39 – 4 )}
    text{= 52.100}
    text{= 5200}
    text{b) 69 + 207 – 46}
    text{= 23.3 + 23.9 – 23.2}
    text{= 23. ( 3 + 9 – 2 )}
    text{= 23.10}
    text{= 230}

  2. a)52.143-52.39-8.26
    =52.143-52.39-4.2.26
    =52.143-52.39-4.52
    =52.(143-39-4)
    =52.100
    =5200
    b)69+207-46
    =23.3+23.9-23.2
    =23.(3+9-2)
    =23.10
    =230
     

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