tim so chia cua mot phep chia , biet rang : so bi chia 410, so du bang 19

a) tim mot so co hai chu so va neu lay so do chia cho chu so hang don vi thi duoc thuong la 8 va du 7

b) tong cua hai so bang 196 . tim hai so do

c)tim so co 3 chu so , biet rang neu viet them mot chu so 3 vao ben phai so do thi no tang them 2217 don vi 

bai 12:Mot vuon co so cay buoi bang 1phan2 cay cam,biet so cay cam bang so chan lon nhat co 3 chu so.Hoivuon do co tat ca bao nhieu cay buoi va cam?

bai 13:tim tich cua so nho nhatco ba chu so khac nhau voi so chan lon nhat co mot chu so.

bai 14:tim mot so,biet rang giam so do di 5 lan sau do them 10 don vi thi duoc so le nho nhat co hai chu so.

bai 15:tim mot so biet rang neu gap so do len 4 lan,duoc bao nhieu lai gap len 6 lan thi duoc 360.

bai 13 :tim tich cua so nho nhat co ba chu so khac nhau voi so chan lon nhat co mot chu so.

bai 14 :tim mot so,biet rang neu giam so do di 5 lan sau do them 10 don vi thi duoc so le nho nhat co hai chu so.

bai 15 :tim mot so biet rang neu gap so do len 4 lan,duoc bao nhieu lai gap len 6 lan thi duoc 360

1.Cho so N la so co hai chu so chia het cho 3.Neu viet xen so 0 vao giua hai chu so do roi cong no voi hai lan chu so hang chuc cua so N ta duoc so moi gap 9 lan so N.Tim so do

2.Tong hai so thap phan la 60,1.Neu dich dau phay cua so nho sang ben phai mot hang roi dem tru di so lon thi ta duoc 219,52.Tim hai so do.

3.Tim so co hai chu so biet neu ta them so 33 vao giua hai chu so do thi duoc mot so moi gap so phai tim 89 lan.

1.mot phep chia co thuong la 8 du 5.tim so bi chia va so chia biet tong cua chung la 158.

2.tim mot so co 2 chu so biet rang neu them so1 vao ben trai so do ta duoc so moi gap 6 lan so ban dau.

3.biet so tu nhien n chia cho 20 du 13 .can them vao n bao nhieu de duoc mot so chia het cho 20 va thuong tang them 4.

​Tim mot so co ba chu so ,biet rang neu viet them chu so 2 vao ben trai so do thi duoc so moi ma tong cua so moi va so phai tim la 2254.

tim mot so co 2 chu so biet rang neu xoa di chu so hang don vi thi so do giam 15 lan

tim so co 4 chu so biet rang chu so tan cung cua so do la so 8 va neu chuyen chu so 8 nay len dau thi ta duoc mot so hon so do la 6192 don vi