Question

eu chiar nu inteleg cum se fac daca ma ajutati dau croana si 18 pct a) 1km-2hm-3dam= b)1,5h+25min-600s c)0,001k+2hg+30dag-500000mg

Answer 1

trebuie transformate in unitatile de masura cerute de problema

a)  1km-2hm-3dam= 1230 m

1 km = 1 000 metri

2 hm =  2 x 100 m = 200 m

3 dam = 3 x 10 m = 30 m

1000 m + 200 m + 30 m = 1230 metri

b) 1,5h+ 25min - 600s =  7 500 s

1,5 ore = 3600 s + 3600 s : 2 = 3 600 + 1800 = 5 400 s

25 min = 25 x 60 = 1 500 s

600 s = 600 s

5400 s + 1500 s + 600 s = 7 500 secunde

c)  0,001k+2hg+30dag-500000mg = 1001 g

0,001 kg = 0,001 x 1000 = 1 gram

2 hg = 2 x 100 g = 200 g

30 dag = 30 x 10 g = 300 g

500 000 mg = 500 000 : 1000 = 500 grame

1 g + 200 g + 300 g + 500 g = 1001 grame