Question

Completati spatiile punctate:3,25m+12dm=,
15,2dam+?dm=235m
9,8Km+4,2dam+30hm=?dam
130mm+?cm+17dm=7m
0,02dam+15m+?hm=20m
17,2cm-?dm=100mm
Ma poate ajuta si pa mine cu scest ex dar sa fie cu toate transformarile adik mai explicat,si urgent va rog?

Answer 1

3,25m+1,2m=4,45m
1520dm+x=2350dm =>x=830dm
980dam+4,2dam+300dam=1284,2dam
13cm + x cm + 170cm=700cm => x=517cm
0,002hm+0,15hm+x hm=0.2hm => x=0,048hm
1,72dm- x dm = 1dm =>x=0,72dm

Answer 2

3,25 m+12 dm=?       transformam in dm, apoi calculam
32,5 dm+12 dm=44,5 dm

1520 dm+? dm=2350 m                transformam in dm
2350 dm-1520 dm=830 dm          scadem din suma termenul cunoscut
15,2 dam+830 dm=235 m

9,8 km+4,2 dam+30 hm=? dam
980 dam+4,2 dam+300 dam=1284,2 dam

700 cm-13 cm-170cm=517 cm
130 mm+517 cm+17 dm=7 m

0,02 dam+15 m+? hm=20 m
0,20 hm-0,002 hm-0,15 hm=0,048 hm   ⇒
0,02 dam+15 m+0,048 hm=20 m

17,2 cm-? dm=100 mm
1,72 dm-? dm=1 dm
1,72 dm-1 dm=0,72 dm     ⇒
17,2 cm-0,72 dm=100 mm