Problema 11:
90 km+70 km=160 km
160x4=640 km in cele 4 zile
640:4= 160 de km pe zi
17) 1 supra 2 (asa cred)
4) 4 dm <3 damv
3 dam=3x100=300 dm
6 hm<6 km
6 km=6x10=60 hm
7 mm<7 m
7 m=7x1000=7000 mm
8 dam>8 dm
8 dam=8x100=800 dm
7) 7 hm+70 cm=7007 dm
7 hm=7x1000=7000 dm
70 cm=70:10=7 dm
7000 dm+7 dm=7007 dm