Cho so thap phan 30,72 .So nay se thay doi the nao neu:a,Xoa bo dau phay .b, Dich dau phay sang ben phai mot chu so. c, Dich dau phay sang ben trai mot chu so.
a Gia tri mot phan so se thay doi nhu the nao neu ta them vao tu so mot so bang mau so va giu nguyen mau so
b Gia tri mot phan so se thay doi nhu the nao neu ta them vao tu so mot so bang tu so va giu nguyen mau so
cho so 1960 so nay se thay doi nhu the nao ? hay giai thich
a neu xoa bo chu so 0
b neu viet them 1 chu so 1 vao sau so do
c neu doi cho hai chu so 9 va 6 cho nhau
em hay viet 9 so thap phan be hon 1 ma moi so do co 1 chu so khac 0
cho so thap phan 30,72 . so nay thay doi the nao neu 0
a / xoa bo dau phay
b/ dich dau phay sang ben phai 1 chu so
c/ dich dau phay sang ben trai 1 chu so
1. khi nhan mot so thap phan co hai chu so o phan thap phan voi 12,35,mot ban da dat tich rieng thang cot voi nhau nhu doi voi phep cong va co ket qua la 220,66. Hay tim ket qua dung cua phep nhan do . Biet rang cac dau phay o cac thua so va ket qua van dat thang cot voi nhau ?
2.tim 2 so biet thuong cua chung bang 1,2 va biet hieu cua chung bang 13,58 ?
ai lam nhanh se duoc tick day ?
Cho 3 chu so 1;5;7 hay lập so thap phan co du 3 chu so da cho ma phan thấp phan cô hai chu so xếp cac chu so thap phan theo thu tu giam dan
cho so 1960 . So nay se thay doi nhu the nao neu doi cho hai chu so 9 va 6 cho nhau
giai chi tiet nha . Minh cam on
Bai1:hieu cua 2 phan so bang 2\(\frac{3}{7}\)phan so thu nhat bang \(\frac{1}{4}\)phan so thu hai.Tim phan so thu 2
Bai 2:nam nay tuoi me hon tuoi con la 25 tuoi.Hai nam truoc day,tuoi me bang \(\frac{7}{5}\)hieu so tuoi hai me con.Vay me nam nay bao nhieu tuoi ?
Bai 3:truoc day mua 5 lit dau phai tra 120000 dong .hien nay gia moi lit dau tang len 6000 dong .hoi voi 120000 dong thi hien nay co the mua duoc bao nhieu lit dau nhu the ?
Bai 4:tim so chan nho nhat co bon chu so sao cho khi chia cho 369 thi co so du lon nhat ?
Bai 5:khi danh so trang 1 quyen sach nguoi ta thay trung binh moi trang phai dung hai chu so . Hoi quyen sach do co bao nhieu trang
Bai 6:cho day so tu nhien lien tiep 1;2;3;4;5;...x
tim x biet day so tren co 1989 chu so
Bai 7:tim so trung binh cong cua tat ca cac so le co hai chu so chia het cho 5
so 2016 thay doi nhu the nao neu
a xoa bo di chu so 6
b viet them chu so 3 vao sau chu so 6
c doi cho hai so 0 va 1 cho nhau
d viet them dau phay vao giua chu so 1 va 6