27.6*74-27.6* 16-27.6*48=27.6*(74- 16-48)=27.6* 10=276

9.8*7.3=( 10-0.2)*7.3=73- 1.46=7 1.54

64*( 1.25+ 12.5)=8*8* 1.25+8*8* 12.5=8* 10+8* 100=80+800=880

18.8-8.8*0.5 = 18.8- 4.4 = 14.4

34. 17*999 =34. 17*( 1000- 1)=34 170-34. 17 = 34 135.83

( 1.25+2.5)*8 = 1.25*8 +2.5*8= 10+20=30

2. 17*9.9+0. 1*2. 17 = 2. 17*(9.9+0. 1)=2. 17* 10=2 1.7

0.5* 1.25*2.5*64 =0.5*2* 1.25*8*2.5*4 = 1* 10* 10= 100

50.9*( 1. 13+5.77)=50.9*6.9=50.9*(7-0. 1)=356.3-5.09=35 1.2 1

0.25*9.6+0.75 =0.25 *4*2.4+0.75=2.4+0.75=3. 17

100/25*0.3=4*0.3= 1.2