0,2*69,4*5= (0,2*5)*69,4=1*69,4=69,4

3,14*0,24+3,14*0,76= 3,14*(0,24+0,76)=3,14*1=3,14

4*2,5*2,26= (4*2,5)*2,26=10*2,26=22,6

43,8+1,4-1,4*43,5= 43,8 +1,4(1-43,5)=43,8+1,4*(-42,5)=43,8- 59,5=-15,7