А)
1) 1254 * 31 + 25250 = 64124
1254 * 31 = 38874
38874+25250 = 64124
2) 12428:26+25108 =25586
12428 : 26 = 478
25108+478 = 25586
3) 855:285+11*265 =2918
855 : 285= 3
11 * 265 = 2915
2915 + 3 = 2918
4) 25899 + 90052 - 680 = 115271
90052 - 680=89372
25899 + 89372 = 115271
Б)
1) 273 * 158 - 9711:83 = 43017
273 * 158 = 43134
9711 : 83 =117
43134 - 117 = 43017
2) 452 * 42 - 7705:67 = 18869
452 * 42 = 18984
7705 : 67 = 115
18984 - 115=18869
3) 12654 + 355 - 2458:2 = 11780
12654 + 355 = 13009
2458 : 2 = 1229
13009-1229 = 11780
4) 100000 - 2306 * 3 = 93082
2306*3 = 6918
100000 - 6918 = 93082
Надеюсь помогла)