Question

вычислите 3 7/15*0,25+5/6-1 2/5---5,4:(3/20+0,75)

Answer 1

3 7/5 * 0,25 +5/6-1 2/5 = 52/15*(0,25=1/4)+5/6-7/5 = 52/60+5/6-7/5 = 
(52+5*10-7*12) /60 (102-84)/60 = 18/60= 3/10= 0,3
5,4 / (3/20+0,75 ) = 5,4 / ( 3/20=0,15)+0,75) =5,1/1= 5,4