600 - 10 x 60 =
700 - 10 x 70 =
800 - 10 x 80 =
900 - 10 x 90 =
250 - 10 x 25 =
350 - 10 x 35 =
450 - 10 x 45 =
550 - 10 x 55 =
650 - 10 x 65 =