kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkllllllkkkkkkkijfugdugduuussguhhhhhhhhhhhhhhhhhhhhhhhhhssssssssssssssssssssssssssssssssuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffssssssssssssssssssssssssssssssssssssssssssssssuuuuuuuuuuuuuuuu
Tổng là:
1 + 9 + 5
= 10 + 5 = 15
Đáp số: 15
1 + 9 + 5
= (1 + 9) + 5
= 10 + 5
= 15