Observe the pattern in the following and fill in the blanks:
$$9 \times 9 +7 =88 $$
$$98 \times 9+6 =888 $$
$$987 \times 9 + 5 =8888 $$
$$9876 \times 9+4 =......$$
$$98765 \times 9 + 3 =....$$
$$987654 \times 9 + 2 = ....$$
$$9876543 \times 9 +1 = ......$$