Fill in what you can and press Check. Nothing you type is sent anywhere.
1
413+913=
2
313+1113=
3
29+13=
4
12+12=
5
12+12=
6
211+111=
7
110+15=
8
18+12=
9
1114+37=
10
79+89=
11
27+17=
12
1217+1017=
13
14+34=
14
519+719=
15
310+710=
16
19+89=
17
1011+111=
18
710+25=
19
23+13=
20
211+111=
Answer key
What is in this set
The numbers in this set run from 1 to 20.
Every problem in it will share a denominator.
A careful solution takes 2 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 169 different ones, 70% — so a sheet of 20 is a new sheet almost every time.
We would put this in front of a grade 4 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.