Assessments · 1st Grade · 8 pages
Missing Addends to 20 Assessments | 1st Grade Math (7 Pages)
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Missing Addends to 20: short check-ups with a score box and answer key. Answer key included.
What’s inside this download
- 8 printable pages of Missing Addends to 20 assessments
- 72 problems for 1st grade
- Short check-ups with a score box and answer key
- Answer key included
- One print-ready PDF, US Letter
Why choose this over a free worksheet
- Includes crossing-ten hidden numbers
- Add-it-back check
- Keys give the hidden part, so you can check by adding it back to 13 or 5
Printing, license and file formats
- One PDF, US Letter 8.5 × 11 in. On A4 choose “fit to page”
- One teacher or one household. Print unlimited copies for your own students, this year and next
- Sharing the file itself needs a separate license
- Digital download — nothing ships
How do I get the files?
- The download link is on the order page the moment you pay, and in your inbox at the same time
- Re-download from that link any time — no account needed
- Wrong or broken file? Email support@pencillane.com and we fix it or refund you
Why get the bundle
- Hidden-number problems help children see addition and subtraction as one idea. The bundle's games and cards give many chances.
The problem
13 + ? = 18, and the answer is 31
A hidden number within 20 is harder than within 10, because counting up on fingers runs out and the sums cross ten.
Adding the numbers shown
In 13 + ? = 18, a child adds 13 and 18 and writes 31. The 18 is the total, not a part.
Counting up past ten
5 + ? = 11 crosses ten. Counting up from 5 on fingers is slow and easy to miscount.
Not seeing the subtraction
18 - 13 gives the missing number. Few first graders see that a hidden-number problem and a take-away problem match.
Each item gives a part and a total and asks for the other part. Children count up in chunks, use a fact they know or subtract, and check by adding.
What’s inside
8 pages of Missing Addends to 20, ready to print.
Short check-ups with a score box and answer key. One instruction line and a name line on every page.
Assessments
Short check-ups with a score box and answer key.
Missing Addends to 20
Written for 1st grade.
Print and go
US Letter, black and white, answer key included.
Look inside
Same layout on every page, so kids stop re-learning the instructions.
How it works
Ready before the printer warms up.
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1
Download
Check out, and your download link is in your inbox and on screen in seconds. One PDF, 8 pages.
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2
Print
Any printer, plain paper, black and white. Print one page or the whole stack.
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3
Hand out
Morning work, centers, small groups, the kitchen table. Same format every day, so the routine sticks.
US Letter 8.5 × 11 · PDFOutcomes
Find the missing addend within 20
Count up or subtract, then check.
- 13 + 5 = 18
- 5 + 6 = 11
- 12 + 5 = 17
- 3 + 17 = 20
- 1 + 17 = 18
- 13 + 2 = 15
- 3 + 11 = 14
Who it’s for
Built for the kitchen table and the classroom.
Parents & homeschool
Put counters under a cup. Say there are 18 in all, show 13, and ask how many are hiding.
Teachers
Fits first grade after addition to 20. Use bingo and games for centers.
Fact-family thinking
A good set for linking addition and subtraction.
Questions
Before you buy.
Do children need subtraction first?
No. Counting up works, and the problems also invite subtraction.
Do the sums cross ten?
Yes. Problems like 5 + ? = 11 cross ten, so children use more than finger counting.
How do I get the file?
The download link appears right after checkout and lands in your inbox at the same time. One PDF with 8 pages. No account needed.
Can I print it more than once?
Yes. One teacher or one household can print unlimited copies for their own students, this year and next.
Will it print in color?
The pages are designed to print in black and white, so they print clean on any home or school printer and do not eat a cartridge.
What if it isn’t right for us?
Email support@pencillane.com within 30 days and we refund the full $3.50. No form, no questions.
Find the hiding part
Missing Addends to 20: short check-ups with a score box and answer key. Answer key included.
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