190x50-3283:49+69046:23=12435
1) 190x50=9500
2) 3283:49=67
3) 69046:23=3002
4) 9500-67+3002=12435
2491:47+8364:82-3094:91=121
1) 2491:47=53
2) 8364:82=102
3) 3094:91=34
4) 53+102-34=121
А) (16+20)/2=18
б) (6*6+20)/7=8
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197,199,211.
5+4y
1) 5+4*3 = 5+12 = 17
2) 5+4*(-7) = 5+(-28) = -23
3) 5+4*0,25 = 5+1 = 6
4)
5) 5+4* = 5+ = 5+(-) =
Ответ:
Пошаговое объяснение:
-3/7*5/13-4/7*5/13= 5/13 * ( -3/7 - 4/7 ) = 5/13 * (-1) = -5/13