Matematică
MedStudent
2016-04-09 23:12:03
Cativa muncitori aveau de sapat un sant de 2 km in trei zile. Stiind ca in primele doua zile au sapat 1400 m,iar in ultimele doua 1200 m, afla cati metri au sapat in fiecare zi
Răspunsuri la întrebare
dany26
2016-04-10 04:26:59

a-prima zi b-a doua zi c-a treia zi 2km=2000m a+b+c=2000m a+b=1400m b+c=1200m a+b+c=2000m 1400m+c=2000m c=2000m-1400m c=600m b+c=1200m b+600m=1200m b=1200m-600m b=600m a+b=1400m a+600m=1400m a=1400m-600m a=800m Verificare: a+b+c=2000m 800m+600m+600m=2000m 1400m+600m=2000m 2000m=2000m corect Sper ca te-am ajutat.

marcowf
2016-04-10 04:28:14

a+b+c=2 km (2000 m) a+b=1400 m b+c=1200 m a= 2000 - 1200; a= 800 m b= 1400 m - 800 m; b= 600 m c= 1200 m - 600 m; b= 600 m V: 800+600+600=2000 m (2 km)

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