Complete this pattern: 55 44 33 _ _

Complete this pattern: 4 14 24 34 _ _ _

Complete this pattern: 5 10 15 20 25 _ _ _ _

Fill in the missing blanks 17~10, 10~3, 7~_

Complete this pattern: 56 52 48 44 _ _ _

Complete this pattern: 100 99 98 97 _ _

Count by 3 from 8 to 20

Fill in the missing blanks 1~5, 8~12, 5~_, 10~_

Count by 2 from 7 to 23:

Complete this pattern: _ 20 25 _ _ 40 _ _ _ _