Practice number sequencing with missing numbers on hundreds chart pieces.

Let's solve this step by step.

We are given a series of hundreds chart pieces — each is a 2x2 grid (like a small section of a hundreds chart), and we need to fill in the missing numbers based on the pattern of a standard hundreds chart.

In a hundreds chart:
- Numbers increase from left to right.
- Each row goes from 1–10, 11–20, ..., 91–100.
- Moving down one row increases the number by 10.
- Moving right increases by 1.

Each 2×2 block represents a portion of this chart. We will use the known number(s) in each block to determine the others.

---

Let's go through each block:

---

#### Row 1:

1. Block with `14` in the bottom-left:
```
[ ][ ]
[14][ ]
```
Since 14 is in the bottom-left, it's the second row, first column of the block.
- So top-left = 14 - 10 = 4
- Top-right = 4 + 1 = 5
- Bottom-right = 14 + 1 = 15

✔ So the block is:
```
[ 4 ][ 5 ]
[14 ][15 ]
```

2. Block with `58` in the top-left:
```
[58][ ]
[ ][ ]
```
- Right of 58 → 59
- Below 58 → 68
- Bottom-right → 69

✔
```
[58][59]
[68][69]
```

3. Block with `73` in top-left:
```
[73][ ]
[ ][ ]
```
- Right: 74
- Down: 83
- Bottom-right: 84

✔
```
[73][74]
[83][84]
```

4. Block with `68` in bottom-right:
```
[ ][ ]
[ ][68]
```
- 68 is bottom-right → so top-right = 68 - 10 = 58
- Top-left = 58 - 1 = 57
- Bottom-left = 68 - 1 = 67

✔
```
[57][58]
[67][68]
```

---

#### Row 2:

1. Block with `64` in bottom-left:
```
[ ][ ]
[64][ ]
```
- Top-left = 64 - 10 = 54
- Top-right = 55
- Bottom-right = 65

✔
```
[54][55]
[64][65]
```

2. Block with `23` in top-left:
```
[23][ ]
[ ][ ]
```
- Right: 24
- Down: 33
- Bottom-right: 34

✔
```
[23][24]
[33][34]
```

3. Block with `86` in middle:
```
[ ][86]
[ ][ ]
```
Wait — this is unusual. The 86 is in the top-right, not corner.

So:
- Top-right = 86 → top-left = 85
- Bottom-left = 86 + 10 = 96
- Bottom-right = 97

✔
```
[85][86]
[96][97]
```

4. Block with `13` in top-left:
```
[13][ ]
[ ][ ]
```
- Right: 14
- Down: 23
- Bottom-right: 24

✔
```
[13][14]
[23][24]
```

---

#### Row 3:

1. Block with `19` in top-left:
```
[19][ ]
[ ][ ]
```
- Right: 20
- Down: 29
- Bottom-right: 30

✔
```
[19][20]
[29][30]
```

2. Block with `49` in top-left:
```
[49][ ]
[ ][ ]
```
- Right: 50
- Down: 59
- Bottom-right: 60

✔
```
[49][50]
[59][60]
```

3. Block with `44` in bottom-left:
```
[ ][ ]
[44][ ]
```
- Top-left = 44 - 10 = 34
- Top-right = 35
- Bottom-right = 45

✔
```
[34][35]
[44][45]
```

4. Block with `69` in bottom-right:
```
[ ][ ]
[ ][69]
```
- Top-right = 69 - 10 = 59
- Top-left = 58
- Bottom-left = 68

✔
```
[58][59]
[68][69]
```

---

#### Row 4:

1. Block with `76` in bottom-left:
```
[ ][ ]
[76][ ]
```
- Top-left = 66
- Top-right = 67
- Bottom-right = 77

✔
```
[66][67]
[76][77]
```

2. Block with `72` in top-left:
```
[72][ ]
[ ][ ]
```
- Right: 73
- Down: 82
- Bottom-right: 83

✔
```
[72][73]
[82][83]
```

3. Block with `87` in top-left:
```
[87][ ]
[ ][ ]
```
- Right: 88
- Down: 97
- Bottom-right: 98

✔
```
[87][88]
[97][98]
```

4. Block with `82` in bottom-left:
```
[ ][ ]
[82][ ]
```
- Top-left = 72
- Top-right = 73
- Bottom-right = 83

✔
```
[72][73]
[82][83]
```

---

#### Row 5:

1. Block with `86` in top-left:
```
[86][ ]
[ ][ ]
```
- Right: 87
- Down: 96
- Bottom-right: 97

✔
```
[86][87]
[96][97]
```

2. Block with `44` in top-left:
```
[44][ ]
[ ][ ]
```
- Right: 45
- Down: 54
- Bottom-right: 55

✔
```
[44][45]
[54][55]
```

3. Block with `46` in bottom-left:
```
[ ][ ]
[46][ ]
```
- Top-left = 36
- Top-right = 37
- Bottom-right = 47

✔
```
[36][37]
[46][47]
```

4. Block with `97` in bottom-right:
```
[ ][ ]
[ ][97]
```
- Top-right = 87
- Top-left = 86
- Bottom-left = 96

✔
```
[86][87]
[96][97]
```

---

Final Answer:

Here are all the completed blocks:

#### Row 1:
```
[ 4 ][ 5 ] [58][59] [73][74] [57][58]
[14 ][15 ] [68][69] [83][84] [67][68]
```

#### Row 2:
```
[54][55] [23][24] [85][86] [13][14]
[64][65] [33][34] [96][97] [23][24]
```

#### Row 3:
```
[19][20] [49][50] [34][35] [58][59]
[29][30] [59][60] [44][45] [68][69]
```

#### Row 4:
```
[66][67] [72][73] [87][88] [72][73]
[76][77] [82][83] [97][98] [82][83]
```

#### Row 5:
```
[86][87] [44][45] [36][37] [86][87]
[96][97] [54][55] [46][47] [96][97]
```

---

✔ All missing numbers filled based on hundreds chart logic.

Let me know if you'd like this formatted as a table or printable version!