Вычисли 9054 * 10 = 40300 : 100 = 370 * 100 = 70500 : 10 = 206 * 1000 = 108000 : 1000 =

9054*10=90540

40300:100=403

370*100=37000

70500:10=7050

206*1000=206000

108000:1000=108

9054*10=90540; 40300:100=403; 370*100=37000; 70500:10=7050; 206*1000=206000; 108000:1000=108.

1) 20*20*3,14=1256

2) 3*2*3,14=18,84

3) 942/3.14=300

a2=a1+0,2*a1=1,2*a1

b2=b1-0,1*b1=0,9*b1

s1=a1*b1

ответ: 8%