Addition To 30: Worksheets And Games - Free Printable

The task involves completing addition pyramids where each number in a block is the sum of the two numbers directly below it. The goal is to fill in the missing numbers so that the pyramid is complete and all additions are correct.

Step-by-Step Solution:

#### Pyramid 1:
```
?
/ \
? ?
/ \ / \
4 2 2 7
```
1. Calculate the second row:
- Top-left block: \( 4 + 2 = 6 \)
- Top-right block: \( 2 + 7 = 9 \)
2. Calculate the top block:
- Top block: \( 6 + 9 = 15 \)

Completed Pyramid:
```
15
/ \
6 9
/ \ / \
4 2 2 7
```

#### Pyramid 2:
```
?
/ \
? ?
/ \ / \
2 4 2 8
```
1. Calculate the second row:
- Top-left block: \( 2 + 4 = 6 \)
- Top-right block: \( 2 + 8 = 10 \)
2. Calculate the top block:
- Top block: \( 6 + 10 = 16 \)

Completed Pyramid:
```
16
/ \
6 10
/ \ / \
2 4 2 8
```

#### Pyramid 3:
```
?
/ \
? ?
/ \ / \
3 4 2 8
```
1. Calculate the second row:
- Top-left block: \( 3 + 4 = 7 \)
- Top-right block: \( 2 + 8 = 10 \)
2. Calculate the top block:
- Top block: \( 7 + 10 = 17 \)

Completed Pyramid:
```
17
/ \
7 10
/ \ / \
3 4 2 8
```

#### Pyramid 4:
```
?
/ \
? ?
/ \ / \
3 2 6 1
```
1. Calculate the second row:
- Top-left block: \( 3 + 2 = 5 \)
- Top-right block: \( 6 + 1 = 7 \)
2. Calculate the top block:
- Top block: \( 5 + 7 = 12 \)

Completed Pyramid:
```
12
/ \
5 7
/ \ / \
3 2 6 1
```

#### Pyramid 5:
```
?
/ \
? ?
/ \ / \
4 2 5 5
```
1. Calculate the second row:
- Top-left block: \( 4 + 2 = 6 \)
- Top-right block: \( 5 + 5 = 10 \)
2. Calculate the top block:
- Top block: \( 6 + 10 = 16 \)

Completed Pyramid:
```
16
/ \
6 10
/ \ / \
4 2 5 5
```

#### Pyramid 6:
```
?
/ \
? ?
/ \ / \
2 3 4 0
```
1. Calculate the second row:
- Top-left block: \( 2 + 3 = 5 \)
- Top-right block: \( 4 + 0 = 4 \)
2. Calculate the top block:
- Top block: \( 5 + 4 = 9 \)

Completed Pyramid:
```
9
/ \
5 4
/ \ / \
2 3 4 0
```

Final Answer:

```
\boxed{
\begin{array}{cccc}
15 & 16 & 17 & 12 \\
6, 9 & 6, 10 & 7, 10 & 5, 7 \\
4, 2, 2, 7 & 2, 4, 2, 8 & 3, 4, 2, 8 & 3, 2, 6, 1 \\
16 & 9 & \\
6, 10 & 5, 4 \\
4, 2, 5, 5 & 2, 3, 4, 0 \\
\end{array}
}
```