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a 1cm
b 0,5cm
2
a 0,75 x 1,5
b 3 x6
b/ 0,5
a/ 0,75 i 1,5
b/ 3 i 6
b) 2*0,25=0,5
a) 1,5*0,5=0,75
3*0,5=1,5
b) 1,5*2=3
3*2=6