Adding fractions with unlike denominators
Difficulty Standard · Set 5njmq8
NameDate
Fill in what you can and press Check. Nothing you type is sent anywhere.
- 135+89=
- 212+15=
- 378+16=
- 456+310=
- 512+911=
- 616+67=
- 712+45=
- 847+13=
- 912+79=
- 10611+12=
- 1135+111=
- 1227+13=
- 1357+811=
- 14311+57=
- 1534+12=
- 1635+710=
- 17110+49=
- 1859+25=
- 1912+58=
- 2015+27=
Answer key
What is in this set
- The numbers in this set run from 1 to 12.
- Every problem in it will have unlike denominators.
- 25% 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 204 different ones, 85% — so a sheet of 20 is a new sheet almost every time.
The same skill, harder or easier
- Starter1–8; 25% need simplifying at the end.
- Standard1–12; 25% need simplifying at the end.
- Stretch1–20; every one will have unlike denominators.
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.
Next to this
Subtracting fractions with the same denominator
Numbers 1–12; every one will share a denominator.
Subtracting fractions with unlike denominators
Numbers 1–12; 25% need simplifying at the end.
Multiplying two fractions
Numbers 1–12; 31% need simplifying at the end.
All of fractions
24 skills in this topic, 71 sets between them.
Printing it
The printed sheet carries no menus and no advertising, and the answer key is on its own page.