How Much Longer? is a free printable Grade 1 maths worksheet on finding a difference in length, aligned to Common Core standard 1.MD.A.1. It prints 16 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 9 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.

How Much Longer?

1.MD.A.1

NameDate

Work out each answer.

1.56 − 1 =

2.25 − 14 =

3.33 − 12 =

4.42 − 16 =

5.56 − 3 =

6.59 − 2 =

7.51 − 7 =

8.47 − 14 =

9.22 − 15 =

10.15 − 5 =

11.31 − 17 =

12.38 − 16 =

13.34 − 10 =

14.36 − 8 =

15.31 − 3 =

16.35 − 8 =

LessonPrint · 1.MD.A.1 · Set 9 · free to copy for classroom use

Answer key — How Much Longer?

Set 9. Prints on its own sheet.

1.55
2.11
3.21
4.26
5.53
6.57
7.44
8.33
9.7
10.10
11.14
12.22
13.24
14.28
15.28
16.27

Last reviewed 2026-09-05. Aligned to 1.MD.A.1 of the Common Core State Standards for mathematics.