The 12-hour clock to the 24-hour clock

Difficulty Stretch · Set n48au0

Give each answer as hh:mm.

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

1
Write 2:34 am as a 24-hour time.
2
Write 2:32 am as a 24-hour time.
3
Write 2:06 am as a 24-hour time.
4
Write 4:18 pm as a 24-hour time.
5
Write 7:27 am as a 24-hour time.
6
Write 5:03 am as a 24-hour time.
7
Write 5:28 am as a 24-hour time.
8
Write 3:11 am as a 24-hour time.
9
Write 11:38 am as a 24-hour time.
10
Write 4:11 am as a 24-hour time.
11
Write 3:27 am as a 24-hour time.
12
Write 2:08 pm as a 24-hour time.
13
Write 12:38 am as a 24-hour time.
14
Write 2:25 am as a 24-hour time.
15
Write 7:57 pm as a 24-hour time.
16
Write 4:22 am as a 24-hour time.
17
Write 9:18 pm as a 24-hour time.
18
Write 11:20 am as a 24-hour time.
19
Write 11:36 am as a 24-hour time.
20
Write 8:51 pm as a 24-hour time.

What is in this set

The numbers in this set run from 1 to 59.
55% of them fall before noon.
45% 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 50% 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 223 different ones, 93% — 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.