1) (-1005).(x cong 2 ) bang 0
2) x cong x cong x cong 91 bang -2
3) / 5x cong 1/ bang 11
( thong cam nha , may mik k viet dc dau cong vs bang )
mik dg gap , giup mik nhe !
1 em mac vay + 2 em mac vay bang may em mac vay
neu 1=5, 2=10, 3=15, 4=20, vay 5 se bang may?
bai 1
tuoi anh bang 2/5 tuoi cha .tuoi em bang 2/3 tuoi anh . hoi tuoi em bang may phan tuoi cha ?
Neu tuoi cha bang 45 . hay tinh tuoi cua 2 anh em?
Bai 2
tuoi cha bang tuoi 2 con cong lai. tuoi nguoi anh bang 1 va 1/12 tuoi em va kem cha 24 tuoi . hoi tuoi cua moi nguoi la bao nhieu?
11111111......1 co 100 so 1 tong bang may
mot nha may co 3 phan xuong . so cong nhan cua phan xuong 1 bang 36% tong so cong nhan nha may so cong nhan cua phan xuong 2 bang 3/5 so cong nhan cua phan xuong 3 . biet so cong nhan cua phan xuong 3 hon so cong nhan cua phan xuong 1 la 18 nguoi . tinh so nguoi moi phan xuong
thuc hien phep tinh bang cach nhanh nhat ( ko dung may tinh )
22^2008-2^2007-2^2006-...-2^2-2-1
200 bang may mu may