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 100-95+90-85+80-75+70-65+60-55

Toán Lớp 6: Tính nhanh
100-95+90-85+80-75+70-65+60-55

Comments ( 2 )

  1. Giải:
    100 – 95 + 90 – 85 + 80 – 75 + 70 – 65 + 60 – 55
    = (100 – 95) + (90 – 85) + (80 – 75) + (70 – 65) + (60 – 55)
    = 5 + 5 + 5 + 5 + 5
    = 5 xx 5
    = 25
     

  2. 100-95+90-85+80-75+70-65+60-55
    =(100-95)+(90-58)+…(60-55)
    =5+5+…+5 ( 5 số hạng )
    =25

Leave a reply

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

About Tùy Linh