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a) 4 × 4½ cm = 18 cm
b) 64 dm ÷ 4 = 16 dm
Zad. 12
a)
a = 3¼ cm
b = 6 cm
Obw = 2 × (3¼ cm + 6 cm) = 2 × 9¼ cm = 18½ cm
b)
a = 14 m
b = 6 m
Obw = 2 × (14 m + 6 m) = 2 × 20 m = 40 m
a) 4 1/2*4=17cm
b)64:4=16dm
12
a)3 1/4*2+6*2=18 1/2cm
Obw. 18 1/2cm
b)14*2=6*2=40m
Obw.40m