Skip to content
LessonPrint

Expanded Form to 99 is a free printable Grade 1 maths worksheet on writing a two-digit number as a sum, aligned to Common Core standard 1.NBT.B.2. 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 15 of 25 · the same problems every time you open this link.

Next set

One paper per pupil

12345678910111213141516171819202122232425

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

Expanded Form to 99

1.NBT.B.2

NameDate

Write each number in expanded form.

1.45 = ___ + ___
2.48 = ___ + ___
3.54 = ___ + ___
4.19 = ___ + ___
5.26 = ___ + ___
6.79 = ___ + ___
7.87 = ___ + ___
8.23 = ___ + ___
9.30 = ___ + ___
10.57 = ___ + ___
11.47 = ___ + ___
12.18 = ___ + ___

LessonPrint · 1.NBT.B.2 · Set 15 · free to copy for classroom use

Answer key — Expanded Form to 99

Set 15. Prints on its own sheet.

  1. 1.40 + 5
  2. 2.40 + 8
  3. 3.50 + 4
  4. 4.10 + 9
  5. 5.20 + 6
  6. 6.70 + 9
  7. 7.80 + 7
  8. 8.20 + 3
  9. 9.30 + 0
  10. 10.50 + 7
  11. 11.40 + 7
  12. 12.10 + 8

Last reviewed 2026-09-05. Aligned to 1.NBT.B.2 of the Common Core State Standards for mathematics.