1 Oblicz w metrach obwody prostokątów o wymiarach:
a) 25 cm i 50 cm
b) 54 cm i 78 cm
c) 3,2 m i 85 cm
d) 7,5 m i 33,4 mm
2 Rozwiąż równanie
x-48,53=3,47
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a) 2*25 cm + 2*50 cm = 150 cm = 1,5 m
b) 2*54 cm + 2*78 cm = 108 cm + 156 cm = 264 cm = 2,64 m
c) 2*3,2 m + 2*85 cm = 6,4 m + 170 cm = 6,4 m + 1,7 m = 8,1 m
d) 2*7,5 m + 2*33,4 mm = 15 m + 66,8 mm = 15 m + 0,0668 m = 15,0668 m
2. x-48,53=3,47
x=3,47+48,53
x=52
a)(2*25)+(2*50)=50+100=150cm= 1,5m
b)(2*54)+(2*78)=108+156=164=1,64m
c)320 cm*2+ 85*2= 640+ 170=810=8,1m
d)7,5*2+0,0334m*2=15m+0,0668=15,0668m
x=3,47+48,53
x=52