Question

4) Calculati :
a) 7m+ 15 dm - 123 cm + 4 2 57 mm
b) 200 g +320 cg- 80dg+2530mg

c) 4 h 15 min 3o s 2 h 25 min
15 S. Va rog mult sa ma ajutați. Dau coroana!!!​

Answer 1

Explicație pas cu pas:

asta e rezolvarea pas cu pas

Answer 2

4.

a)

7m+15dm-123cm+4257mm=

=7000mm+1500mm+1230mm+4257mm=

=8500mm+1230mm+4257mm=

=9730mm+4257mm=13987mm

b)

200g+320cg-80dg+2530mg=

=20000cg+320cg-800cg+253cg=

=20320cg-800cg+253cg=

=19520cg+253cg=

=19773cg

c)

4h15min30s+2h25min=

=6h40min30s=

=6×3600s+40×60s+30s=

=21600s+2400s+30s=

=24030s