Missing Change Stories is a free printable Grade 2 maths worksheet on the unknown in the middle of the story, aligned to Common Core standard 2.OA.A.1. It prints 6 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
Set 1 of 25 · the same problems every time you open this link.
1.Noor has 12 cards. After finding some more, Noor has 51. How many were found?
Answer:
2.Priya has 14 acorns. After finding some more, Priya has 28. How many were found?
Answer:
3.Priya has 15 conkers. After finding some more, Priya has 25. How many were found?
Answer:
4.Jonah has 32 pencils. After finding some more, Jonah has 38. How many were found?
Answer:
5.Ama has 32 marbles. After finding some more, Ama has 59. How many were found?
Answer:
6.Noor has 40 cards. After finding some more, Noor has 45. How many were found?
Answer:
LessonPrint · 2.OA.A.1 · Set 1 · free to copy for classroom use
Answer key — Missing Change Stories
Set 1. Prints on its own sheet.
1.39
2.14
3.10
4.6
5.27
6.5
Questions about Missing Change Stories
What does the Missing Change Stories worksheet cover?
It practises the unknown in the middle of the story — 6 questions for Grade 2, all on Common Core 2.OA.A.1: Solve one- and two-step story problems within 100. The instruction to pupils is “Read carefully, then work out the answer”, and the answer key follows on the next sheet.
Which Common Core standard does Missing Change Stories practise?
CCSS.MATH.CONTENT.2.OA.A.1 — 2.OA.A.1, in the Operations & Algebraic Thinking domain for Grade 2. The published standard reads: “Use addition and subtraction within 100 to solve one- and two-step word problems.” The worksheet assesses that standard rather than a paraphrase of it.
What age or grade is this worksheet for?
Missing Change Stories is written for Grade 2, typically ages 7-8. It is one of the sheets on 2.OA.A.1, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.
Does Missing Change Stories come with an answer key?
Yes. All 6 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.
How many different versions of Missing Change Stories can I print?
25 — one per pupil, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.
Is Missing Change Stories free to print and photocopy?
Yes. Missing Change Stories, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.
More practice for 2.OA.A.1
Solve one- and two-step story problems within 100.