1) Vereenvoudig de breuk. Gebruik in je uitkomst dus getallen die zo [?] mogelijk zijn.
Soms bekom je een geheel getal. B.v. 12/4 = 3. Hier kun je de teller door de noemer delen.
6/8 = [?]
8/10 = [?]
10/4 = [?]
6/2 = [?]
4/6 = [?]
9/9 = [?]

2) Vereenvoudig weer. Gebruik dus de kleinst mogelijke getallen in je uitkomst.
20/10 = [?]
6/4 = [?]
50/60 = [?]
8/10 = [?]
8/14 = [?]
40/100 = [?]

3) We tellen op en vereenvoudigen verder waar mogelijk.
1/4 + 2/4 =
5/6 + 1/6 = = [?]
1/7 + 3/7 =
5/10 + 2/10 =
5/8 + 5/8 = = [?]
6/20 + 13/20 =
7/40 + 13/40 = = [?]
5/100 + 32/100 =
9/30 + 17/30 = = [?]
5/9 + 1/9 + 1/9 =
8/20 + 2/20 + 13/20 =
10/50 + 10/50 + 5/50 = = [?]
37/100 + 43/100 + 20/100 = = [?]
20/100 + 20/100 + 20/100 = = [?]
5/70 + 6/70 + 7/70 + 8/70 = = [?]

4) We oefenen nog even verder, maar een beetje moeilijker (we blijven vereenvoudigen).
6/10 + 1/10 + [?] = 12/10 = [?]
3/21 + + 3/21 = 13/21
+ 30/100 + 5/100 = 80/100 = [?]
4/9 + [?] + 1/9 = 1
6/30 + + 1/30 = 22/30 = [?]
+ 5/7 = 9/7
5/70 + 6/70 + 7/70 + = 27/70