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 6: a,A=-30-24-25+123+124+125 b,B=-(-800)+(1267-987)-67+1987

Toán Lớp 6: a,A=-30-24-25+123+124+125 b,B=-(-800)+(1267-987)-67+1987

Comments ( 2 )

  1. Giải đáp:
    A=293
    B=3030
    Lời giải và giải thích chi tiết:
    A=-30-24-25+123+124+125
    =(-30)+(-24)+(-25)+123+124+125
    =[(-30)+(-24)+(-25)]+(123+124+125)
    =(-79)+372
    =293
    B= -(-800)+(1267-987)-67+1987
    =800+310-67+1987
    =800+310+(-67)+1987
    =(800+310+1987)+(-67)
    =3097+(-67)
    =3030
     

  2.  a) A = – 30 – 24 – 25 + 123 + 124 + 125
    = (-54) – 25 + 123 + 124 + 125
    = (-79) + 123 + 124 + 125
    = 44 + 124 + 125
    = 168 + 125 
    = 293
    b) B= – ( -800) + ( 1267 – 987 ) – 67 + 1987
    = 800 +  1267 – 987 – 67 + 1987
    = 2067 – 987 – 67 + 1987
    = 1080 – 67 + 1987
    = 1013 + 1987
    = 3000
     

Leave a reply

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

About Kim Dung