1.20/60+15/60+10/60+12/60=57/60 60/60-57/60=3/60=1/20 3.1cm→250000cm 1cm→2500m 1cm→2,5km 2,5×19=47,5km 4. 20km→15min. x → 150min x=20×150/15 x=200(km) 7. 3000→100% x → 85% x=85×3000/100 x=2550 2550→100% x →85% x=85×2550/100 x= 2167,5 9. 9:7:4 9+7+4=20 9/20;7/20;4/20 9/20=45/100=45% 7/20=35/100=35% 4/20=20/100=20% 10. 43500→87% x →100% x=100×43500/87 x=50000 11. IIIa 16 ch i 16 dz IIIb 7ch→25% x →100% x=100×7/25 x=28 28-7ch=21dz IIIc 12ch→48% x→ 100% x=100×12/48 x= 25 25-12ch=13dz 85→100% 50→x x=50×100/85 x~`59% 5. 7,8×10do5 km 8,3×10do-2 g 4,7×10do2ha=4,7× 10do4 a 7,23×10do-6 l 6. a=5do45-5do44=5do1=5 b=125do350 c=5d045 d=15do44:3do43= 125do350>5do45>5>5do44:3do43
zad1 wspulny mianownik to -120 pododaniu pieciu pracowników wynosi 114 120-114=0.05 zad2 10 {razy}6=60 zad3 250000-2,5km 19 razy 2,5=4.75 zad4 v-stała odl-20 t- 15 20 razy 200 km zad5 a)7800000000 b)8300000 c)4,7 ha 4700a zad6 b,c,d,a zad7 3000 razy 0.15=450 450 razy 2=900 3000-900=2100 zad8 300 : 6 =50 zad9 a 0.45 b o.35 c0.20 zad10 43500 razy o,13=5715 43500+5715=49215 zad11 50+ 25+48=123 123:3=41% 100-41=59% prosze , banalne
