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: tính nhanh 1-2+3-4+5-6+7-8+…+99-100

Toán Lớp 6: tính nhanh 1-2+3-4+5-6+7-8+…+99-100

Comments ( 2 )

  1. 1-2+3-4+5-6+7-8+…+99-100
    = ( 1-2 ) + ( 3-4 ) + ( 5-6) + (7-8) +…+ ( 99-100 )
    = (-1) + (-1) + (-1) + (-1) +…+ (-1)
    = (-1) . 50
    = -50

  2. a/ 1 – 2 + 3 – 4 + 5 – 6 + 7 – 8 + … + 99 – 100
    = (1 – 2) + (3 – 4) + (5 – 6) + (7 – 8) + … + (99 – 100)
    = -1 + (-1) + (-1) + (-1) + … + (-1)
    = -1. 50
    = -50 

Leave a reply

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

About Xuân