2п*R=6.28
R=6.28/2п (п=3.14)
R=6.28/6.28
R=1
13770000:450=30600
1350
2700
2700
0
1128 + 266832 ÷ (8460 − 302 ×<span> 27) = 2000
1) </span>302 × <span>27 = 8154
2) 8460 </span>− <span>8154 = 306
3) 266832 </span><span>÷ </span><span>306 = 872
4) 1128 + 872 = 2000</span>
(63-84)÷(14-21)
(-21)÷(-7)
Ответ:3