Explicație pas cu pas:
5 × 19/20
simplificam 5 cu 20
= 19/4
4×15/18
simplificam 4 /18 , dar 18 nu se imparte cu 4 deci simplificam 2
=2×15/9
=30/9
simplificam 30/9 , dar 30 nu se imparte cu 9 deci simplificam 3
=10/3
1/2×5/6=5/12
7/8×9/14
1/8×9/2=2/72 = 1/36
1 intreg 3/4 × 2 intregi 1/5
1 intreg 3/4 = 1×4+3/4=7/4
2 intregi 1/5 = 2×5+1/5=11/5
=7/4 × 11/5 = 77/20
2 intregi 4/9 × 3 intregi 1/11
= 22/9 × 34/11
=2/9×34/1
=68/9
