23- 2*(4,5)=23-9=14
14:4=3,5
3,5+4,5=8
spr. 2*3,5+2*8=7+16=23
Odp. Jeden bok ma 3,5cm, a drugi 8cm.
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23- 2*(4,5)=23-9=14
14:4=3,5
3,5+4,5=8
spr. 2*3,5+2*8=7+16=23
Odp. Jeden bok ma 3,5cm, a drugi 8cm.