tinh bang 2 cach
a) 9/15 chia 17/15 +8/15 chia 17/15
cach 1:?
cach 2:?
b) 0.9 chia 0.25 +1.05 chia 0.25
cach 1:?
cach 2:?
ai tra loi nhanh nhat mk tick
cac ban co the giai thich tai sao nam 1671 lai bang 17 the ki
cho 1 so co 4 chu so co tong bang 24 viet nguoc lai duoc so da cho tim so do biet nhom 2 chu so ben trai hon 2 chu so ben phai la 36
giai theo cach tieu hoc ai nhanh mik tik
mot manh vuon hinh tam giac ABC co dien tich la 90 m2 canh AB bang 10 m Tren canh BC lay M sao cho BM bang 2 lan MC nguoi ta muon ngan 1 phan de trong hoa bang cach ke 1 doan thang qua M cat AB tai N sao cho dien tich BMN la dien tich trong hoa = 15 m2 Hoi N cach B bao nhieu met
ban ak cho minh hoi la tai sao 7,2 x 1000 lai bang 7200 vay ma ko bang 7200,0 cho minh hoi voi
1 cong truong xay dung can chuyen ve 35,7 tan sat .Lan dau cho duoc 2/7 so sat do ve bang xe tai , moi xe tai cho duoc 1,7 tan san sat ,lan thu 2 cho het so sat con lai voi so xe tai bang 1/2 so xe luc dau .Hoi moi xe luc sau cho duoc bao nhieu tan sat? Giai ho tui nha ban ......
1 THUNG DUNG 17,65L DAU NGUOI TA LAY O THUNG RA 3,5LSAU DO LAY RA 2,75L HOI TRONG THUNG CON LAI BAO NHIEU L DAU ( GIAI BANG 2 CACH )
2 nguoi di nguoc chieu va khoi hanh 1 luc tu 2 dia dia diem A va B . 1 nguoi di xe may va 1 nguoi 1 nguoi di xe dap. ho gap nhau tai C cach A la 15 km roi lai tiep tuc di nguoi di tu B->A roi lai tro ve B va nguoi di tu A->Blai tro ve A . lan T2 ho lai gap nhau tai B.
a,Tinh quang duong AB?
b,van toc xe may gap may lan van toc xe may?
tai sao 50000cm3 lai bang 50lit nuoc?(giai thich day du)
cac ban giup mk tick cho