Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 7: 1, A= 6^3 + 3 x 6^2 + 3^3/-13 2, 13 x 87 + 42/13 x 88 + 29 – 115 x 89 + 3/115 x 88 -118

Toán Lớp 7: 1, A= 6^3 + 3 x 6^2 + 3^3/-13
2, 13 x 87 + 42/13 x 88 + 29 – 115 x 89 + 3/115 x 88 -118

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     

    toan-lop-7-1-a-6-3-3-6-2-3-3-13-2-13-87-42-13-88-29-115-89-3-115-88-118

  2. Giải đáp:
     1. A = $\frac{6^3+ 3 . 6^2+ 3^3}{-13}$ 
    = $\frac{2^3. 3^3+3 . 2^2.3^2.3^4}{-13}$
    = $\frac{3^3.8+3^3.4+3^3.1}{-13}$ 
    = $\frac{3^3.(8+4+1)}{-13}$ 
    = $\frac{3^3.13}{-13}$ 
    =$3^{3}$ . 1
    = -27
    2. $\frac{13 . 87+42}{13.88+29}$ – $\frac{115.89+3}{115.88-118}$
    = $\frac{13.(88-1)+42}{13.88+29}$ $\frac{13.88-13+42}{13.88+29}$ – $\frac{115.88+118}{115.88+118}$ 
    = $\frac{13.88+29}{13.88+29}$ – $\frac{115.88+118}{115.88+118}$ 
    = 1 – 1 = 0
     

Leave a reply

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