ban an phai tim tat ca cac so co 3 chu so lon hon 500 ma tong cac chu so cua moi so do deu bang 12 dong thoi chu so hang don vi bang trung binh cong cua chu so hang tram va hyang chuc hoi ban an tim duoc nhieu nhat bao nhieu so thoa man yeu cau
Ban An phai tim tat ca cac so co 3 chu so lon hon 500 ma tong cac chu so cua moi so do deu = 12, dong thoi chu so hang don vi = trung cong cua chu so hang tram va hang chuc. Hoi ban An tim duoc nhieu nhat may so thoa man yeu cau?
Bach do Chien:
"do ban tim duoc so tron chuc lon hon 40.000 co cac chu so khac nhau ma tong cac chu so cua so do bang 10.Khi cong so do voi so viet theo thu tu nguoc lai thi duoc mot so co 5 chu so giong nhau.
Chien thach thuc:
-Neu tim duoc so do thi sao?
-Thi to cho cau di an kem tha cua chu sao.
nham mot lat,roi viet ngay hai so do ra giay.Chien than phuc roi dua ban di an kem.
cac ban cung thu suc nhe
Tim cac so tron chuc co 5 chu so khac nhau,biet rang chu so hang chuc nghin la 5;tong cua 4chu so con lai la 8.Co tat ca bao nhieu so thỏa man de bai ? Sap xep cac so tim duoc theo thu tu tu lon den be.
Tim mot so co hai chu so biet khi viet so do theo tu tu nguoc lai ta duoc so moi kem son phai tim 18 don vi va biet tong hai chu so do la 8
tim so co 2 chu so biet rang neu viet cac chu so theo thu tu nguoc lai ta dc so moi ma tong cua so moi va so phai tim la 77
bai 1 ; tuoi cua anh va tuoi cua em cong lai la 34 tuoi . Anh hon em 6 tuoi . Tinh tuoi cua moi nguoi
bai 2 ; mot thua ruong hinh chu nhat co chu nvi la 360 m , chieu rong be hon chieu dai la 20m . Tinh dien tich thua ruong
bai 3 ; tong cua hai so chan la 45 . Tim hai so do , biet rang giua chung chi co 5 so le
bafi 4 ; tong cua cac chu so cua mot so co hai chu so bang 11 . Neu thay doi thu tu cua cac chu so thi da cho tang them 27 don vi . Tim so do
giai ho minh nhe
1.viet cac so tu 100den 999 phai dung bao nhieu chu so 0?
2.mot phep tru co tong so bi tru va so tru la 450.so tru gap 4 lan hieu.tim so tru
3.mot hinh chu nhat co dien tich 720m va chieu rong bang 4/5 chieu dai.tim chu vi
4.trong dot thi ''do vui de hoc'' co 6 lop tham gia,moi lop co so hoc sinh tham gia bang nhau,cac em du thi deu duoc 10diem va 8 diem.tong so điem dat duoc cua cac lop la 160 diem.hoi co bao nhieu ban dat duoc 8 diem?
co bai giai ra luon nhe cam on cac ban!
Co bao nhieu so co 3 chu so ma chi het cho 3 va 5 khi viet theo thu tu nguoc lai thi so do van khong thay doi