The 12-hour clock to the 24-hour clock

Difficulty Standard · Set 0zweu2

Give each answer as hh:mm.

Fill in what you can and press Check. Nothing you type is sent anywhere.

1
Write 2:30 pm as a 24-hour time.
2
Write 6:50 pm as a 24-hour time.
3
Write 3:45 pm as a 24-hour time.
4
Write 2:25 am as a 24-hour time.
5
Write 3:55 am as a 24-hour time.
6
Write 3:55 am as a 24-hour time.
7
Write 11:05 pm as a 24-hour time.
8
Write 9:50 pm as a 24-hour time.
9
Write 9:00 am as a 24-hour time.
10
Write 12:15 pm as a 24-hour time.
11
Write 3:00 am as a 24-hour time.
12
Write 4:25 am as a 24-hour time.
13
Write 11:20 pm as a 24-hour time.
14
Write 9:50 pm as a 24-hour time.
15
Write 7:30 pm as a 24-hour time.
16
Write 5:30 pm as a 24-hour time.
17
Write 8:25 pm as a 24-hour time.
18
Write 9:45 am as a 24-hour time.
19
Write 9:45 am as a 24-hour time.
20
Write 9:20 pm as a 24-hour time.

What is in this set

The numbers in this set run from 1 to 55.
51% of them fall before noon.
49% of them fall in the afternoon or the evening.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 53% of the problems: the twelve hours were never added on.
Answers are a short answer exactly as the problem asks for it.

Drawing 240 problems from this page produced 160 different ones, 67% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 5 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.