trung binh cong cua 4 so 30,20,10,5 la bao nhieu?  

chuc cac ban nam moi an khang thinh vuong ,hoc gioi va nhieu diem online maths" diem xuat sac" va "diem hoi dap" nhe!

so ket mot tuan hoc 3 to cua lop 6a dat duoc nhieu diem gioi neu lay 1/5 so diem gioi cua to 1 chia deu cho 2 to kia thi so diem gioi cua 3 to bang nhau neu to 1 duoc them 8 diem gioi nua thi so diem gioi cua to 1 bang tong so diem gioi cua 2 to kia hoi moi to duoc bao nhoieu diem gioi

thi ky 1 ca lop 5a,5b,5c co so diem gioi so diem lop 5a bang 1/2 tong so diem 5b va 5c so diem gioi cua 5b bang 2/3 tong so diem2 lop kia.lop 5c co 16 diem gioi . tinh so diem gioi cua 3 lop

Ba ban An , Binh , Cuc di mua vo . Biet tong so vo ma ba ban mua la 17 quyen . So vo cua An va Binh mua nhieu hon so vo cua Cuc la 3 quyen . So vo cua An bang 2/3 so vo cua Binh . Hoi moi ban co bao nhieu quyen vo ?

Giup mk nha ai lam nhanh nhat mk tk cho

lop 5a cuoi hoc ky 1 chi gom 3 loai hoc sinh gioi kha va trung binh so hoc sinh gioi bang 1/3 so hoc sinh cua lop .So hoc sinh kha it hon 3/5 so hoc sinh trung binh la 2 em.Tinh so hoc sinh gioi va kha cua lop biet so hoc sinh trung binh la 15 em

trong so cac bai kiem tra mon toan cuoi hoc ki 1 cua khoi lop 4 co 3/7 so bai dat diem kha .biet so bai dat diem gioi va diem kha la 29/35 so bai kiem tra .hoi so bai dat diem gioi chiem bao nhieu phan cua so bai kiem tra

lop 5b cuoi hocj ky 2 co 3 loai hs gioi, kha, trung binh. so hs gioi bang 3/5 so hs  ca lop. so hs kha it hon 3/5 so loai trung binh la 2 em. tinh so hs gioi , kha cua lop biet so hs trung binh la 15em

-0,6 x X - 7/3 = 5,4

2,8 : (1/5 - 3 x X) = 1 2/5

lop 6a co 3 loai hs gioi kha va trung binh. trong do 2/3 so hs gioi la 8 em. so hs gioi bang 80% so hs kha. so hs trung binh bang 7/9 tong so hs kha va hs gioi tim so hs cua lop

tinh gia tri cua bieu thuc sau: a= 7/4 x (3333/1212 + 3333/2020 + 3333/3030 + 3333/4242)

Ngoc Bao khoe voi bn hoc ki 1 bai kiem tra cua to chi dat diem kha hoac gioi trong do 65% so bai kiem tra dat diem gioi em hay tinh xem hoc ki 1 Ngoc Bao co bao nhieu bai kiem tra dat diem gioi biet so bai kiem tra dat diem gioi nhieu hon so bai dat kiem tra diem kha la 18 bai