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

Toán Lớp 7: câu1 tính a 11/15.12/13-15/15+11/15.13 b2^5.15^4/6^3.10^2 làm nhanh giùm mình với

Toán Lớp 7: câu1 tính
a 11/15.12/13-15/15+11/15.13
b2^5.15^4/6^3.10^2 làm nhanh giùm mình với

Comments ( 2 )

  1. a 11/15.(12/13+1).13
    =11/15.25/13.13
    =518/195.13
    =518/15
    b(2^5. 15^4)/(6^3. 10^2)=(2^5 . 3^4 . 5^4 )/(2^3 .3^3 . 2^2. 5^2)=(2^5 . 3^4 . 5^4)/(2^5 . 3^3 . 5^2)=3.5^2=25.3=75

  2. a 11/15.(12/13+1).13
    11/15.25/13.13
    518/195.13
    518/15
    b 750000
     

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

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