1.Cho 5 chu so 3,4,5,6,8,9.Lap duoc bn so co 4 chu so khac nhau tu cac chu so tren
2.Tinh tong cua so lon nhat va so be nhat co 4 chu so khac nhau duoc viet boi cac chu so 0,2,4,8
giup minh voi
cau 1 ;2 so co tong la 346 biet so be la so co hai chu so va khi viet them chu so 3 vao truoc so be thi duoc so lon tim so be
cau 2 ; tong 2 so la 390 so be l¸o co 2 chu so va neu viet them chu so 3 vao truoc so be thi duoc so lon tim so lon
cau3;chu vi 1 khu dat hinh chu nhat =68 chieu dai hon chieu rong16m nguoi ta trong rau tren khu dat do TB cu 2m vuong trong duoc 2 kg rau tinh so rau o khu dat do
cau4 ; TBCcua 2 so la so nho nhat co 3chu so khac nhau biet so lon lon hon TBCcua 2so la 24 don vi tim so be va so lon
Viet lien cac so tu nhien tu 17 den 23 de duoc so co nhieu chu so . Xoa di 7 chu so va giu nguyen thu tu cac chu so con lai de duoc :
a)so lon nhat
b)so be nhat
1.tim hieu cua 2 so lon nhat co 4 chu so voi 207.roi lay hieu do chia cho 64 ta duoc thuong la bao nhieu
2.khi viet them so 3 vao ben trai so tu nhien co 2 chu so ,ta duoc so moi gap 7 lan so tu nhien ban dau.tim so tu nhien ban dau
tim so tu nhien co hai chu so biet rang neu viet chu so 0 xen giua so hang chuc va hang don vi cua so do ta duoc so moi gap 10 lan so phai tim neu viet chu so 1 vao ben traiso vua nhan thi so do gap len 3 lan
tim so tu nhien co 2 chu so neu viet them chu so 0 xen giua chu so hang chuc va hang don vi cua so do ta duoc so moi gap 10 lan so can tim . neu viet them chu so 1 vao ben trai so vua nhan duoc thi so do gap len 3 lan . so can tim
tim so tu nhien co 2 chu so ,biet rang neu viet them chu so 0 xen giua chu so hang chuc va hang don vi cua so do ta duoc so moi gap 10 lan so can tim .Neu viet them chu so 1 vao ben trai so vua nhan duoc thi so do gap len 3 lan.
1 Viet so tu nhien lon nhat va be nhat va be nhat co :
a) 4 chu so .............................
b) 5 chu so ..............................
cho a la so tu nhien co 3 chu so . viet cac chu so cua a theo thu tu nguoc lai ta duoc so tu nhien b . hoi hieu hai so do co chia het cho 3 khong ? vi sao