1850-1800
3003-3000
9040-9000
2) 1240-1200
23400-23000
3) 4x16=64
64x2=128
4)multiplii m- dam,hm,km
submultiplii litrului: dal,hl,kl
multiplii kg: q,t
2 luni consecutive pot avea 60-61 zile
anul are 366,365 zile si 12 luni
5) 11x6=66m matase
6)25+35=60kg pere
60:10=6kg pere in ladita