Two-Step Equations

Mathematics · Addition & Subtraction · ages 8-9

Name ______________________ Date ____________

What is n if 3 x n = 21?
Answer: ______________
What is n if n + 7 = 15?
- 7
- 9
- 8
- 6
Leo buys 3 packs of 4 stickers, plus 2 more stickers. Let n be the total. Which equation matches?
- 3 x 4 + 2 = n
- 3 + 4 x 2 = n
- 3 x 4 - 2 = n
In a two-step equation, a letter can stand for the number you don't know yet.
Circle one: True False
What is n if 2 x n - 4 = 10?
Answer: ______________
Before solving 4 x 9 + 6 = n, Priya rounds 4 x 9 to about 40, then adds 6. About what should the exact answer be close to?
- About 4
- About 400
- About 46
What is n if 3 x n + 5 = 26?
- 7
- 6
- 8
- 9
Lena solves 4 x n + 3 = 19 and gets n = 4. She checks 4 x 4 + 3 = 19. Is Lena right?
Circle one: True False
Ty wrote n - 15 = 50 for: he had some crayons, his friend gave him 15 more, and now he has 50. What is wrong?
- It should be n x 15 = 50
- It should be n + 15 = 50, since he gained crayons
- Nothing is wrong
What is n if 2 x n + n = 27?
- 8
- 9
- 7
- 6

Answer key

For grown-ups. Fold this page away before handing over the rest.

7 · 21 shared into 3 equal parts is 7.
8 · 15 - 7 = 8, so n = 8.
3 x 4 + 2 = n · 3 packs of 4 stickers is 3 x 4, then add the 2 extra ones.
True · Yes, that is exactly what the letter is for.
7 · 2 x n = 14, so n = 7.
About 46 · Rounding 4 x 9 to 40 and adding 6 gives an estimate near 46, so the exact answer should land close to that.
7 · 3 x 7 + 5 = 21 + 5 = 26.
True · Lena is right: her check lands on 19.
It should be n + 15 = 50, since he gained crayons · Getting more crayons means adding, not subtracting.
9 · 2 x n + n is 3 lots of n, and 27 divided by 3 is 9.