Write in the missing number names in each sequence. 1 seventeen, eighteen, nineteen, . 2-3 , thirty, thirty-one, . How many spoons?

The sequence is "seventeen, eighteen, nineteen, ____". This is a counting sequence.
The next number is twenty.

The sequence is "____, thirty, thirty-one, ____". This is a counting sequence.
The number before thirty is twenty-nine.
The number after thirty-one is thirty-two.

Section: How many spoons?

There are 5 groups, with 2 spoons in each group.

The total number of spoons is $\boxed{\text{10}}$. (This is already correctly filled in the image).

There are 5 groups, with 5 spoons in each group.

The total number of spoons is $\boxed{\text{25}}$. (This is already correctly filled in the image).

Section 6-8: The number square has a hole. What are the three missing numbers? Write them on the grid.

The visible numbers (0, 1, 5, 15, 16) suggest a grid where numbers increase by 1 horizontally and by 5 vertically (e.g., 0, 1, 2, 3, 4 in the first row; 5, 6, 7, 8, 9 in the second row; 10, 11, 12, 13, 14 in the third row; 15, 16, 17, 18, 19 in the fourth row).

• The cell to the right of "1" in the first row is missing. Following the pattern, this number is 2.
• The cell to the right of "5" in the second row is missing. Following the pattern, this number is 6.
• The cell directly above "16" in the fourth row is missing. Following the pattern, this number is 11.

The three missing numbers are $\boxed{\text{2, 6, 11}}$.

Section: Write in the answers.
The addition problems (9-13) are already correctly filled in the image:

• $9: 3 + 2 = 5$
• $10: 1 + 4 = 5$
• $11: 4 + 3 = 7$
• $12: 5 + 0 = 5$
• $13: 2 + 2 = 4$