Calculează:
a) 13 m+ 548 cm= cm
69 hm + 173 m= ...m;
59 km + 9 dam= .. dam;
b) 60 m - 468 cm ... cm;
87 cm - 530 mm ... mm;
15 km - 23 dam ... dam;
c) 4500 m - 320 dam = ... dam;
7800 m - 49 hm = ... hm;
5500 m-5 km = ... m.
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Verified answer
Explicație pas cu pas:
a) 13 m+548 cm=
13 m=13×100=1300 cm
1300 cm+548 cm=1848 cm
69 hm+173 m=
69 hm=69×100=6900 m
6900 m+173 m=7073 m
59 km+9 dam=
59 km=59×100=5900 dam
5900 dam+9 dam=5909 dam
b) 60 m-468 cm=
60 m=60×100=6000 cm
6000 cm-468 cm=5532 cm
87 cm-530 mm=
87 cm=87×10=870 mm
870 mm-530 mm=340 mm
15 km-23 dam=
15 km=15×100=1500 dam
1500 dam-23 dam=1477 dam
c) 4500 m-320 dam=
4500 m=4500:10=450 dam
450 dam-320 dam=130 dam
7800 m-49 hm=
7800 m=7800:100=78 hm
78 hm-49 hm=29 hm
5500 m-5 km=
5 km=5×1000=5000 m
5500 m-5000 m=500 m
Succes!