To solve the problem, we need to evaluate each equation with the given value of the variable and determine whether the statement is true or false. Let's go through each one step by step.
1. \( y + 5 = 17 \), \( y = 22 \)
- Substitute \( y = 22 \) into the equation:
\[
22 + 5 = 27
\]
- The result is 27, not 17.
-
False
2. \( 4x = 24 \), \( x = 6 \)
- Substitute \( x = 6 \) into the equation:
\[
4 \times 6 = 24
\]
- The result is 24, which matches the equation.
-
True
3. \( n \div 7 = 3 \), \( n = 21 \)
- Substitute \( n = 21 \) into the equation:
\[
21 \div 7 = 3
\]
- The result is 3, which matches the equation.
-
True
4. \( s - 13 = 21 \), \( s = 34 \)
- Substitute \( s = 34 \) into the equation:
\[
34 - 13 = 21
\]
- The result is 21, which matches the equation.
-
True
5. \( 20 \times y = 300 \), \( y = 160 \)
- Substitute \( y = 160 \) into the equation:
\[
20 \times 160 = 3200
\]
- The result is 3200, not 300.
-
False
6. \( n + 40 = 92 \), \( n = 50 \)
- Substitute \( n = 50 \) into the equation:
\[
50 + 40 = 90
\]
- The result is 90, not 92.
-
False
7. \( 27 = 3m \), \( m = 9 \)
- Substitute \( m = 9 \) into the equation:
\[
3 \times 9 = 27
\]
- The result is 27, which matches the equation.
-
True
8. \( 7 + t = 21 \), \( t = 11 \)
- Substitute \( t = 11 \) into the equation:
\[
7 + 11 = 18
\]
- The result is 18, not 21.
-
False
9. \( x - 8 = 24 \), \( x = 32 \)
- Substitute \( x = 32 \) into the equation:
\[
32 - 8 = 24
\]
- The result is 24, which matches the equation.
-
True
10. \( n + 24 = 61 \), \( m = 45 \)
- There seems to be a typo here. The variable in the equation is \( n \), but the given value is for \( m \). Assuming it should be \( n = 45 \):
- Substitute \( n = 45 \) into the equation:
\[
45 + 24 = 69
\]
- The result is 69, not 61.
-
False
Final Answers:
1. False
2. True
3. True
4. True
5. False
6. False
7. True
8. False
9. True
10. False
\[
\boxed{\text{False, True, True, True, False, False, True, False, True, False}}
\]
Parent Tip: Review the logic above to help your child master the concept of math worksheet for grade 9.