Break Apart 9 is a free printable Kindergarten maths worksheet on decompositions of nine, aligned to Common Core standard K.OA.A.3. It prints 12 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 19 of 25 · the same problems every time you open this link.

One paper per pupil

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Break Apart 9

K.OA.A.3

NameDate

Fill in the missing part.

1.9 = 1 + ___

2.9 = ___ + 3

3.9 = ___ + 2

4.9 = 6 + ___

5.9 = ___ + 1

6.9 = 2 + ___

7.9 = ___ + 8

8.9 = ___ + 6

9.9 = 4 + ___

10.9 = ___ + 9

11.9 = ___ + 0

12.9 = 0 + ___

LessonPrint · K.OA.A.3 · Set 19 · free to copy for classroom use

Answer key — Break Apart 9

Set 19. Prints on its own sheet.

1.8
2.6
3.7
4.3
5.8
6.7
7.1
8.3
9.5
10.0
11.9
12.9

Last reviewed 2026-09-05. Aligned to K.OA.A.3 of the Common Core State Standards for mathematics.