Пошаговое объяснение:
1) 103x - (44x+18x) = 103x - 62x = 41x
2) 326x + (17x -14x) = 326x + 3x = 329x
5) 35a + 18 + 15a + 11 = 50a + 29
7) 12y + y + 52 + 8y + 3 = 21y + 55
2) 276m - (172m + 14m) = 276m - 186m = 90m
4) 262 + (132 - 52) = 262 + 80 = 342
6) 42x + 45 + 8x + 45 = 50x + 90
8) 2046 + 306 + 6b + 56 = 6b + 2408
Номер 1.
1) (486 + 351) + 514 = (486 + 514) + 351 = 1000 + 351 = 1351
2) 2786 + 871 + 129 = (871 + 129) + 2786 = 1000 + 2786 = 3786
3) 147 + 256 + 353 + 244 = (147 + 353) + (256 + 244) = 500 + 500 = 1000
4) (3681 + 11 388) + (4319 + 1612) = (3681 + 4319) + (11 388 + 1612) =
= 8000 + 13 000 = 21 000
Номер 2.
1) (148 + 245) - 45 = (245 - 45) + 148 = 200 + 148 = 348
2) (473 + 132) - 173 = (473 - 173) + 132 = 300 + 132 = 432
3) 843 - (154 + 243) = (843 - 243) - 154 = 600 - 154 = 446
4) 894 - (394 + 148) = (894 - 394) - 148 = 500 - 148 = 352
1) 103x - ( 44x + 18x ) = 103x - 62x = 41x
2) 276m - ( 172m + 14m ) = 276m - 186m = 90m
3) 326x + ( 17x - 14x ) = 326x + 3x = 329x
4) 26z + ( 13z - 5z ) + z = 26z + 8z + z = 34z + z = 35z
5) 35a + 18 + 15a + 11 = 35a + 15a + 18 + 11 = 50a + 29
6) 42x + 45 + 8x + 45 = 42x + 8x + 45 + 45 = 50x + 90
7) 12y + y + 52 + 8y + 3 = 12y + y + 8y + 52 + 3 = 13y + 8y + 55 = 21y + 55
8) 204b + 30b + 6b + 56 = 234b + 6b + 56 = 240b + 56