Here are the step-by-step solutions for each problem:
1. $7 + n = 21$
To find $n$, subtract 7 from 21.
$21 - 7 = 14$
So, $n = 14$.
Correct option: c
2. $40 - s = 25$
To find $s$, you can think: "40 minus what number equals 25?" Or subtract 25 from 40.
$40 - 25 = 15$
So, $s = 15$.
Correct option: b
3. $16 \times n = 32$
To find $n$, divide 32 by 16.
$32 \div 16 = 2$
So, $n = 2$.
Correct option: d
4. $s + 5 = 12$
To find $s$, subtract 5 from 12.
$12 - 5 = 7$
So, $s = 7$.
Correct option: a
5. $24 \div 6 = n$
Divide 24 by 6.
$24 \div 6 = 4$
So, $n = 4$.
Correct option: d
6. $18 \times s = 36$
To find $s$, divide 36 by 18.
$36 \div 18 = 2$
So, $s = 2$.
Correct option: b
7. $100 - x = 50$
To find $x$, subtract 50 from 100.
$100 - 50 = 50$
So, $x = 50$.
Correct option: c
8. $60 \div 6 = n$
Divide 60 by 6.
$60 \div 6 = 10$
So, $n = 10$.
Correct option: a (Note: Option d is also 10, but 'a' is the first correct choice listed).
9. $14 + n = 14$
To find $n$, subtract 14 from 14.
$14 - 14 = 0$
So, $n = 0$.
Correct option: c
10. $10 - x = 8$
To find $x$, subtract 8 from 10.
$10 - 8 = 2$
So, $x = 2$.
Correct option: a
Final Answer:
1. c
2. b
3. d
4. a
5. d
6. b
7. c
8. a
9. c
10. a
Parent Tip: Review the logic above to help your child master the concept of algebra 1 practice test.
