Fill in what you can and press Check. Nothing you type is sent anywhere.
1
89−12=
2
12−113=
3
1117−311=
4
411−16=
5
310−19=
6
1415−511=
7
78−29=
8
719−15=
9
1318−211=
10
914−719=
11
514−13=
12
712−819=
13
12−13=
14
1213−1115=
15
23−517=
16
1516−417=
17
310−15=
18
23−38=
19
25−119=
20
1317−58=
Answer key
What is in this set
The numbers in this set run from 1 to 20.
Every problem in it will have unlike denominators.
23% of them need simplifying at the end.
A careful solution takes 4 written steps on average.
The mistake this set invites most often, in 89% of the problems: the tops were combined and the bottoms were combined; the denominator names the size of the part and never changes when parts are counted.
Answers are a fraction in its lowest terms, written like 3/4.
Drawing 240 problems from this page produced 229 different ones, 95% — so a sheet of 20 is a new sheet almost every time.
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.