Рнектердің мәнін тап.
208 - (50 820 : 33 + 460) : 40
(28 254 : 34 + 12 505: 61) - 20
259 - 69 +1 836: 27​

Пошаговое объяснение:

.

53 % = 0,53   102 % = 1,02

59 % = 0,59   125 % =  1,25

67 % = 0,67   284 % = 2,84

45 % = 0,45   352 % =  3,52

90 % = 0,9     85 % =  0,85

2.

0,065 = 6,5%   0,82 = 82%

1,67 = 167%      0,025 =  2,5%

2,01 = 201%      0,716 =  71,6%

0,803 = 80,3% 0,053 =  5,3%

1,075 = 107,5%  3,39 =  339%

3.

40 % от 120  = 120 * 0,4 (40% = 0,4) = 48

60 % от 350  = 350 * 0,6 (60% = 0,6) = 210

25 % от 20  = 20 * 0,25 (25% = 0,25) = 5

15 % от 60  = 60 * 0,15 (15% = 0,15) = 9

21 % от 90  = 90 * 0,21 (21% = 0,21) = 18,9

30 % от 84 = 84 * 0,3 (30% = 0,3) = 25,2

Подробнее - на -

144-(X:11+21) * 5=14                       представь (х:11+21)*5=А получим уравнение
                                                         144 - А=14  решаем его
(X:11+21) * 5=144-14                        А=144-14
                                                           А=130
(X:11+21) * 5=130                           (х:11+21)*5=130
                                                         теперь представь (х:11+21)=В
(X:11+21) =130:5                              В*5=130
                                                          В=130:5
X:11+21 = 26                                     В=26
                                                         х:11+21=26
х:11=26-21                                        х:11=26-21
                                                           х:11=5
х:11=5                                                 х=5*11
                                                            х=55
х=5*11

х=55
144-(55:11+21)*5=14
144-26*5=14
 144-130=14
 14=14