Question

inmultirea si impartirea unchiurilor
42g*3=
12g 15m*4=
14g 28m 12s*5=
5g 17m 52s*6=
23g impartim3=
34g 15m impartim4=
27g 14m 28s impartim 4=
58 g 23 m 18s impartim 3=
*-inmultim

Answer 1

42g*3= 126g
12g 15m*4=49g
15m*4=60m=1g
12g*4+1g=48g
48g+1g=49g

14g 28m 12s*5=72g 21m
12s*5=60s=1m
28m*5=140m=2g 20m
14g*5=70g
70g+2g=72g
20m+1m=21m

5g 17m 52s*6=31g 47m 12s
52s*6=312s= 5m 12s
17m*6=102 m = 1g  42 m
5g*6=30g
30g+1g=31g
5g+42g=47g

23g :3= 7g 40m
23g -2 g=21 g    21g:3 =7 g
2 g=120 m  120 m:3=40 m

34g 15m :4= 8g 33m 45s
34g-2g=32g  32g:4=8g
2g=120 m
120m+12 m=132m  132m :4=33 m
15m-12m=3m    3m=180s    180s:4=45s

27g 14m 28s : 4= 6g 48m 37s
27g-24 g= 3g    24g:4=6g
3g=180m
180m+12m=192m  192m:4=48m
2m=120m
120s+28s=148s  148s:4=37s

58 g 23 m 18s : 3= 19g 27m 46 s
58g-57g=1g   57 g:3=19g
1g=60m
60m+21m=81m  81m:3=27 m
2m=120s
120s+18s=138s  138s:3= 46 s