Fill in what you can and press Check. Nothing you type is sent anywhere.
1
720+1217=
2
67+114=
3
57+14=
4
211+37=
5
1112+18=
6
411+717=
7
415+1617=
8
716+15=
9
511+12=
10
25+12=
11
619+1213=
12
37+25=
13
719+34=
14
56+13=
15
415+1120=
16
13+25=
17
811+1019=
18
45+313=
19
313+211=
20
13+1116=
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.
19% of them need simplifying at the end.
A careful solution takes 4 written steps on average.
The mistake this set invites most often, in 100% 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 234 different ones, 98% — 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.