Question

Зделайте пожалуйста даю 30 баллов

Answer 1

1............. ........... .. ...

Answer 2

1) 3/7+(-1/14) = 3/7-1/14 = 5/14
2) -1/5-1/10 = 2+1/10 = -3/10
3) -7/8×16/21 = 7× 2/21 = -2/3
4) 3/5÷(-2/15)= 3/5×15/2= -3×3/2= -9/2
2 задание:
1) 1/2×1/3-3/4×2/3= 1/6-1/2= -1/3
2) 1/5+(2/3-3/4) ÷1/2= 1/5×(-1/12)÷1/2= -1/5×1/12×2= -1/5×1/6=-1/30