Mot so tu nhien khac 0 thay doi nhu the nao neu ta viet them
a,chu so 0 vao cuoi so do
b,chu so 2 vao cuoi so do
Tim so tu nhien co hai chu so biet rang so do gap doi tich cac chu so cua no
Cac ban giup minh nha minh can gap
1 so tu nhien A co 4 chu so co chu so hang don vi lon hon 3 lan chu so hang tram, chu so hang chuc gap 8 lan chu so hang nghin, biet A chia het cho 9. Tim A.
Tim hai so biet tong cua chung bang so lon nhat co ba chu so va hieu cua hai so do bang so lon nhat co hai chu so
tong cua 3 so la 836 chu so hang tram cua so thu nhat la 5 so thu 2 la 3 neu xoa bo cac chu so 5va 3 thi se duoc 2 so co 2 chu so ma so nay gap 2 lan so kia tim 2 so do.
Ting nham bang cach dung tinh chat phan phoi phep nhan voi phep cong
13.102 53.101 399.1001.
Tinh nham bang cach dung tinh chat :a(b-c)=ab-ac
98.199 65.999
\Tinh nham bang cach them vao o so hang nay va bot di o so hang kia cung mot so
577+399 1005+1234
Tinh nham bang cach them vao o so tru va so bai tru cung mot so
2213-1998 12345-9997
Tinh nham bang cach nhan thua so nay chia thua so kia cung 1 so
28.251 8888.125
Tinh nham bang cach nhan ca so bi chia va so chia cho cung mot so
222:25 1111:125
mot cua hang thuc pham co 5 thung dung hai loai trung ga va vit trong 1 thung dung 1 loai so trung trong 1 thung lan luot la 267 qua 174 qua220 qua 204 qua 156 qua sau khi ban het mot thung trung ga nguoi ban thay so trung ga bang 1/2 so trung vit hoi luc dau cua hang co may loai trung va co bao nhieu qua
Mot cua hang ban dc 56 hop keo va hop banh, trong do so hop keo bang 3/4 so hop banh. Hoi cua hang ban dc bao nhieu hop moi loai
Chia 129 cho 1 so ta duoc so du la 10. Chia 61 cho so do ta cung duoc so du la 10.Tim so chia do.