345 x 87 + 690 x 5 + 1035
= 345 x 87 + 345 x 5 x 2 + 345 x 3
= 345 x 87 + 345 x 10 + 345 x 3
= 345 x (87 + 10 + 3)
= 345 x 100
= 34500
= 345 x 87 + 345 x 5 x 2 + 345 x 3
= 345 x 87 + 345 x 10 + 345 x 3
= 345 x (87 + 10 + 3)
= 345 x 100
= 34500
cảm ơn mn đã tick nha, love mn nhìu ❤