so du cua(ab+ba)khi chia cho 11
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Co ai tra loi duoc ko ????
ko ai tra loi duoc u??? Cac ban lop 9,8,7 cung ko lam duoc a
ko lam duoc mk lam cho nhung k nha
Neu bot o so do 9 don vi ta duoc so moi chia het cho 11 va 14. muon thuong giua so moi va 11 cung bang thuong giua so moi voi 1 khi chia so moi cho 11 can bot o tu so moi la : 11 x 3 = 333 [don vi]
hieu giua 14 va 11 la
14 - 11 = 3
thuong giua so ben phai tim voi 14 la
33 : 3 = 11
so phai tim la
14 x 11 + 9 = 163
k nha
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Ta có ab+ba= 10.a+ b + b.10+a = 11.a+11.b
mà 11.a và 11.b chia hết cho 11
suy ra ab+ba chia hết ch 11
suy ra ab+ba chia cho 11 có số dư là 0
Vậy ab+ba chia cho 11 dư 0
Nhớ k cho mình nếu bạn thấy đúng nhé!
so du la 0