Ответ:
1. 36
2. 42
3. 935
3. 1280
Пошаговое объяснение:
1. 18*52 - 18*37 - 18*13 = 18*(52 - 37 - 13) = 18*2 = 36
2. 42*31 - 38*42 + 21*16 = 21*(2*31 - 2*38 + 16) = 21*(62 - 76 + 16) = 21*2 = 42
3. 21*74 + 21*11 - 85*10 = 21*(74+11) - 85*10 = 21*85 - 85*10 = 85(21-10) = 85*11 = 85(10+1) = 850 + 85 = 935
3. -128*39+78*32+64*59 = 32(-4*39+78+2*59) = 32(-156+78+118) =
32(-156+196) = 32*40 = 1280