Question

Вычислите удобным способом
1)6+(-7)-(-15)-(-6)-30
2)3 1/6 + (-2 5/9)-(-1 7/12)

Answer 1

1) 6+(-7)-(-16)-(-6)-30= 6-7+16+6-30= 12-7+16-30=5+16-30= 21-30= -9
2) 3 1/6 +(-2 5/9) -(-1 7/12)= 19/6- 23/9+ 19/12= 38/12-23/9+19/12= 57/12-23/9= 171/36-92/36= 79/36= 2 7/36