Odpowiedzi

2009-12-07T18:30:43+01:00
A) (7cm+13cm) x 2 = 40cm
b) (4,3cm+6,7cm) x 2 = 22 cm
c) 4,25 x 4 = 17 dm
d) 34 cm = 3,4dm (2dm+3,4dm) x 2 = 10,8 cm
e) (4,5 m + 6,25) x 2 = 21,5cm
f) ( 4,3dm+2,4 dm) x 2 = 13,4 dm
2009-12-07T18:33:32+01:00
A) 7×2+13×2=40 cm
b) 2×4,3+2×6,7=22cm
c) 4,25×4= 17dm= 170 cm
d) 20 cm×2+34×2= 108 cm
e) 450cm×2+ 625cm×2= 900+1250= 2150cm = 21,5m
f) 43cm×2+24cm×2=134cm