a) 12 grade 13 minute x3=36 grade 39 minute
b) 15 grade 28 minute 30 secunde x4= 60 grade 112 minute 120 secunde=
61 de grade 54 minute si 0 secunde
c) 58 grade 130 secunde x4= 232 grade 520 secunde=232 grade 8 minute 40 secunde
d) 25 grade 12 minute 43 secunde x 2= 50 grade 24 minute 86 secunde= 50 grade 25 minute 26 secunde
e) 3 grade 58 minute x16=48 grade 928 minute=63 de grade 28 minute
f) 125 grade :2= 62 de grade 30 minute
g)18 grade 33 minute :4= 4 grade (2x60+33):4 minute= 4 grade 38 minute (60:4) secunde= 4 grade 38 minute 15 secunde
h) 15 grade 49 minute 18 secunde ÷2= 7 grade (60+49):2 minute 18 secunde= 7 grade 54 minute (60+18):2 secunde= 7 grade 54 minute 39 secunde
i)24 grade 38 minute 10 secunde ÷5=4 grade (4x60+38):5 minute 10 secunde= 4 grade 47 minute (3x60+10):5 secunde= 4 grade 47 minute 14 secunde
j)17 grade 32 minute ÷2=8 grade (60+32):2 secunde= 6 grade 46 secunde