Question

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Answer 1

Răspuns:

Explicație pas cu pas:

a)P=4l

P=4×30mm=120mm=0,12m

P=4×15cm=60cm=0,6m

P=4×2,5 dm==10dm=1m

P=4×70,4 m=281,6m

P=4×0,02 km=4×20m=80m

b)l=P:4

l=100 000mm/4=100m/4=25m

l=300dm/4=30m/4=7,5m

l=0,24km/4=240m/4=60m

Answer 2

Răspuns:

a)

P=4×30mm=120mm=12cm=0,12m;

P=4×15cm=60cm=0,6m;

P=4×2,5dm=10dm=1m;

P=4×70,4m=281,6m;

P=4×0,02km=4×20m=80m;

b)

formula P=4l

l=P÷4

l=100000mm÷4=100m÷4=25m;

l=300dm÷4=30m÷4=7,5m

l=0,24km÷4=240m÷4=60m.