Solve the following elementary math exercises including fill in the blanks and true/false questions.

Here are the solutions to the exercises:

1. Fill in the blanks:

• a) $25 = \boxed{2}$ tens + $\boxed{5}$ ones
• b) $4 \times \boxed{4} = 16$
• c) $17 + 3 = \boxed{20}$
• d) $22 - 11 = \boxed{11}$
• e) How many tens are there in 25: $\boxed{2}$
• f) $\boxed{19}$ comes before 20
• g) 23 lies between $\boxed{22}$ and $\boxed{24}$

2. Write TRUE or FALSE:

• a) The greater of 1 and 4 is four. $\boxed{\text{TRUE}}$
• b) $4 < 5$ ones. $\boxed{\text{TRUE}}$
• c) Ten + 10 = 25 $\boxed{\text{FALSE}}$
• d) 2 must be added to 5 to make 7. $\boxed{\text{TRUE}}$
• e) 3 does not lies between 4 and 5. $\boxed{\text{TRUE}}$