Math worksheet for estimating and comparing sums and differences.

To solve the problem, we need to evaluate each inequality and determine whether it is true or false. Let's go through each part step by step.

---

Part (A): Evaluate the inequalities

#### 1. \( 3 \times 8 > 20 \)
- Calculate \( 3 \times 8 \):
\[
3 \times 8 = 24
\]
- Compare \( 24 \) with \( 20 \):
\[
24 > 20
\]
- This inequality is true.

#### 2. \( 6 + 8 < 15 \)
- Calculate \( 6 + 8 \):
\[
6 + 8 = 14
\]
- Compare \( 14 \) with \( 15 \):
\[
14 < 15
\]
- This inequality is true.

#### 3. \( 99 - 9 > 80 \)
- Calculate \( 99 - 9 \):
\[
99 - 9 = 90
\]
- Compare \( 90 \) with \( 80 \):
\[
90 > 80
\]
- This inequality is true.

#### 4. \( 22 + 5 < 30 \)
- Calculate \( 22 + 5 \):
\[
22 + 5 = 27
\]
- Compare \( 27 \) with \( 30 \):
\[
27 < 30
\]
- This inequality is true.

#### 5. \( 73 - 3 > 60 \)
- Calculate \( 73 - 3 \):
\[
73 - 3 = 70
\]
- Compare \( 70 \) with \( 60 \):
\[
70 > 60
\]
- This inequality is true.

---

Part (B): Solve the equations and compare

#### 1. \( 50 + 30 = 100 - 2 \)
- Calculate \( 50 + 30 \):
\[
50 + 30 = 80
\]
- Calculate \( 100 - 2 \):
\[
100 - 2 = 98
\]
- Compare \( 80 \) with \( 98 \):
\[
80 \neq 98
\]
- This equation is false.

#### 2. \( 492 - 50 = 500 - 8 \)
- Calculate \( 492 - 50 \):
\[
492 - 50 = 442
\]
- Calculate \( 500 - 8 \):
\[
500 - 8 = 492
\]
- Compare \( 442 \) with \( 492 \):
\[
442 \neq 492
\]
- This equation is false.

#### 3. \( 90 - 8 = 80 + 3 \)
- Calculate \( 90 - 8 \):
\[
90 - 8 = 82
\]
- Calculate \( 80 + 3 \):
\[
80 + 3 = 83
\]
- Compare \( 82 \) with \( 83 \):
\[
82 \neq 83
\]
- This equation is false.

#### 4. \( 160 - 4 = 100 + 2 \)
- Calculate \( 160 - 4 \):
\[
160 - 4 = 156
\]
- Calculate \( 100 + 2 \):
\[
100 + 2 = 102
\]
- Compare \( 156 \) with \( 102 \):
\[
156 \neq 102
\]
- This equation is false.

#### 5. \( 300 - 6 = 212 + 8 \)
- Calculate \( 300 - 6 \):
\[
300 - 6 = 294
\]
- Calculate \( 212 + 8 \):
\[
212 + 8 = 220
\]
- Compare \( 294 \) with \( 220 \):
\[
294 \neq 220
\]
- This equation is false.

---

Final Answer

For Part (A), all inequalities are true:
\[
\boxed{\text{True, True, True, True, True}}
\]

For Part (B), all equations are false:
\[
\boxed{\text{False, False, False, False, False}}
\]