The reciprocal of a whole number

Difficulty Stretch · Set ebzep8

Write the reciprocal of each number, as a fraction.

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

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

What is in this set

The numbers in this set run from 2 to 20.
Every problem in it will have a whole number on one side.
A careful solution takes 1 written step on average.
The mistake this set invites most often, in 100% of the problems: a reciprocal is not a negative.
Answers are a fraction in its lowest terms, written like 3/4.

Drawing 240 problems from this page produced 19 different ones, 8% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 6 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.