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: b, (85 + 106 +17) – (85+17) a,(x+7)–25=13

Toán Lớp 6: b, (85 + 106 +17) – (85+17)
a,(x+7)–25=13

Comments ( 2 )

  1. b) (85+106+17)-(85+17)
    = 208-102
    = 106
    a) (x+7)-25= 13
    x+7= 13+25
    x+7= 38
    x= 38-7
    x= 31
     

  2. Giải đáp:
     $b) (85+106+17)-(85+17)$
    $= 85+106+17-85-17$
    $= (85-85)+(17-17)+106$
    $= 0+0+106$
    $=106$
    $c) (x+7)-25=13$
    $⇒ x+7= 13+25$
    $⇒ x+7= 38$
    $⇒ x= 38-7$
    $⇒ x=31$
    $vậy$ $x=31$
     

Leave a reply

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