Let’s solve each problem one by one, step by step.
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1. 7 + n = 21
We want to find what number added to 7 gives 21.
Subtract 7 from both sides:
n = 21 - 7
n = 14 →
Answer: c. 14
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2. 40 – s = 25
We want to find what number subtracted from 40 gives 25.
So, s = 40 - 25
s = 15 →
Answer: b. 15
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3. 16 × n = 32
What number times 16 equals 32?
Divide both sides by 16:
n = 32 ÷ 16
n = 2 →
Answer: d. 2
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4. s + 5 = 12
What number plus 5 equals 12?
s = 12 - 5
s = 7 →
Answer: a. 7
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5. 24 ÷ 6 = n
24 divided by 6 is...
24 ÷ 6 = 4 →
Answer: d. 4
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6. 18 × s = 36
What number times 18 equals 36?
s = 36 ÷ 18
s = 2 →
Answer: b. 2
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7. 100 – x = 50
What number subtracted from 100 gives 50?
x = 100 - 50
x = 50 →
Answer: c. 50
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8. 60 ÷ 6 = n
60 divided by 6 is...
60 ÷ 6 = 10 →
Answer: a. 10 (Note: option d is also 10 — probably a typo, but answer is 10)
Wait — options are:
a. 10
b. 15
c. 12
d. 10 ← duplicate
But since 60 ÷ 6 = 10, and both a and d say 10, we pick the first correct one:
a. 10
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9. 14 + n = 14
What number added to 14 gives 14?
Only 0 works.
n = 14 - 14 = 0 →
Answer: c. 0
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10. 10 – x = 8
What number subtracted from 10 gives 8?
x = 10 - 8 = 2 →
Answer: a. 2
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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 worksheet free.
