1)0,5*74,8*2=(0,5*2)*74,8=1*74,8=74,8
2)0,25*3,67*0,4=(0,25*0,4)*3,67=3,67*0,1=0,367
3)0,42*5,19+5,19*0,58=5,19(0,42+0,58)=5,19*1=5,19
4)62,9*1,8-62,7*1,8=1,8(62,9-62,7)=1,8*0,2=0,36
б)9,54*10=95,4
9,54*100=954
9,54*1000=9540
9,54*10000=95400
9,54*0,1=0,954
9,54*0,00010,000954