№1
а)0.206*65=13.39
б)3.5*18=63
в)2.07*37=76.59
г)394.2/9=43.8
д)82.44/12=6.87
е)47.94/85=0.564
№2
50-23*(66.6/37)=50-23*1.8=50-41.4=8.6
№3
1.а)12.378*10=123.78
1.б)12.378*10000=123780
2.а)48.7/10=4.87
2.б)48.7/100=0.487
№4 - плохо снята
№5
А) 7х+2.4=34.6
7х=34.6-2.4
7х=32.2
х=32.2/7
х=4.6
Б) (у-1.8)/8=0.2
у-8=0.2*8
у-8=1.6
у=1.6+8
у=9.6