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: Bài1: a. 96 – 196 b. (-6).(-15) c.(-15 ) + 5.( – 3 ) e. (- 3 ). ( – 4 ) + 4.(-

Toán Lớp 6: Bài1:
a. 96 – 196 b. (-6).(-15)
c.(-15 ) + 5.( – 3 ) e. (- 3 ). ( – 4 ) + 4.(- 7)
d.23.15 – [ 149 – ( 12 – 5)2 ] f. 42.53 + 42.47 – 2300
Giups mình nhanh nhé

Comments ( 2 )

  1. a. 96 – 196= -100
    b. (-6).(-15)= 90
    c.(-15 ) + 5.( – 3 )
    = (-15) + (-15)
    =          -30
    d.23.15 – [ 149 – ( 12 – 5)² ]
     = 345 -[ 149 – 7²]
    = 345 -[ 149 – 49]
    = 345 – 100
    =     245
    e. (- 3 ). ( – 4 ) + 4.(- 7)
     =    12             + (-28)
    =             -16
    f. 42.53 + 42.47 – 2300
     = 42.(53+47)-2300
    = 42 . 100      – 2300
    = 4200          – 2300
    = 1900
     

  2. Bài 1:
    a, 96 – 196
      = 96 + (-196)
      = -100
    b, (-6) · (-15)
      = 90
    c, (-15) + 5 · (-3)
      = -15 + (-15)
      = -30
    d, 23 · 15 – [149 – (12 – 5)^2]
      = 23 · 15 – [149 – 7^2]
      = 23 · 15 – [149 – 49]
      = 23 · 15 – 100
      = 345 – 100
      = 245
    e, (-3) · (-4) + 4
      = 12 + 4
      = 16
    f, 42 · 53 + 42 · 47 – 2300
     = 42 · (53 + 47) – 2300
     = 42 · 100 – 2300
     = 4200 – 2300
     = 1900
     

Leave a reply

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

About Thúy Mai