Single-Digit Addition Worksheets

These sheets cover all 100 basic addition facts, from 0 + 0 to 9 + 9. They are the facts students need to recall instantly before they meet regrouping in two-digit addition.

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Sheet code 51YYFQ
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Single-Digit Addition

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Add.

1.9+6=
2.5+4=
3.8+7=
4.6+7=
5.4+7=
6.5+1=
7.9+0=
8.7+4=
9.3+9=
10.2+5=
11.4+9=
12.7+0=
13.6+5=
14.3+8=
15.7+5=
16.1+9=
17.5+6=
18.3+1=
19.9+9=
20.0+4=
21.3+5=
22.0+2=
23.1+0=
24.1+4=
25.0+6=
26.8+8=
27.6+9=
28.7+9=
29.7+7=
30.2+2=
endlessmathsheets.comSheet 51YYFQ

Answer keySingle-Digit Addition

Add.

1.9+6=15
2.5+4=9
3.8+7=15
4.6+7=13
5.4+7=11
6.5+1=6
7.9+0=9
8.7+4=11
9.3+9=12
10.2+5=7
11.4+9=13
12.7+0=7
13.6+5=11
14.3+8=11
15.7+5=12
16.1+9=10
17.5+6=11
18.3+1=4
19.9+9=18
20.0+4=4
21.3+5=8
22.0+2=2
23.1+0=1
24.1+4=5
25.0+6=6
26.8+8=16
27.6+9=15
28.7+9=16
29.7+7=14
30.2+2=4
endlessmathsheets.comSheet 51YYFQ

What's on this worksheet

Both numbers are single digits (0 to 9), so sums range from 0 to 18. Each sheet comes with an answer key on a separate page.

Teaching tips

  • Sort the facts into strategy groups: +0, +1, +2, doubles, near doubles and make ten. Only a handful of "hard" facts are left.
  • Use the stacked format to preview how columns work in two-digit addition.
  • Keep a list of the facts a child misses and print the next sheet when those are the focus of the week.

How to use this worksheet maker

Press New worksheet for a fresh set of problems, then Print. To save a PDF instead, choose "Save as PDF" in the print window. Every sheet has a short code in the bottom corner. Copy the link to a sheet and you can print exactly the same problems again later, which is handy for retakes and for sharing with other teachers.

Common Core alignment: 2.OA.B.2 (Grades 1–2).