Write the predecessor and successor of numbers, write the number between two given numbers, and continue a pattern.

Here are the solutions to the math problems:

Write the predecessor (the number before):

• The predecessor of 52 is $\boxed{\text{51}}$.
• The predecessor of 90 is $\boxed{\text{89}}$.
• The predecessor of 111 is $\boxed{\text{110}}$.
• The predecessor of 257 is $\boxed{\text{256}}$.
• The predecessor of 300 is $\boxed{\text{299}}$.
• The predecessor of 538 is $\boxed{\text{537}}$.
• The predecessor of 649 is $\boxed{\text{648}}$.
• The predecessor of 70 is $\boxed{\text{69}}$.
• The predecessor of 860 is $\boxed{\text{859}}$.
• The predecessor of 909 is $\boxed{\text{908}}$.

Write the successor (the number after):

• The successor of 79 is $\boxed{\text{80}}$.
• The successor of 169 is $\boxed{\text{170}}$.
• The successor of 200 is $\boxed{\text{201}}$.
• The successor of 352 is $\boxed{\text{353}}$.
• The successor of 468 is $\boxed{\text{469}}$.
• The successor of 307 is $\boxed{\text{308}}$.
• The successor of 430 is $\boxed{\text{431}}$.
• The successor of 729 is $\boxed{\text{730}}$.
• The successor of 887 is $\boxed{\text{888}}$.
• The successor of 945 is $\boxed{\text{946}}$.

Write the number between:

• 67 $\boxed{\text{68}}$ 69
• 199 $\boxed{\text{200}}$ 201
• 109 $\boxed{\text{110}}$ 111
• 758 $\boxed{\text{759}}$ 760
• 920 $\boxed{\text{921}}$ 922

Continue the pattern:

• 472, 476, 480, $\boxed{\text{484}}$, $\boxed{\text{488}}$, $\boxed{\text{492}}$ (adding 4 each time)
• 540, 560, 580, $\boxed{\text{600}}$, $\boxed{\text{620}}$, $\boxed{\text{640}}$ (adding 20 each time)
• 950, 900, 850, $\boxed{\text{800}}$, $\boxed{\text{750}}$, $\boxed{\text{700}}$ (subtracting 50 each time)