Question

упростите выражения: 1)8,3-a+1,7 2)5/9+b-1/4 3)13.5+x-1.5-13.5 4)5/6+y-5/6+1/6 5)48.5-m+1.5-48.5 6)n+5/9-8-5/9 7)2*m*(-3) 8)-6*n*(-5) 9)5/6*k-(-2/5) 10)2/3*(-n)*1/2 11)3/8*(-m)*2/3 12)5/9*(-n)*3/5

Answer 1

1) 8,3-a+1,7=10-a

2)5/9+b-1/4=11/36+b

3)13.5+x-1.5-13.5=x-1.5

4)5/6+y-5/6+1/6=y+1/6

5)48.5-m+1.5-48.5=1.5-m 

6)n+5/9-8-5/9=n-8

7)2*m*(-3)=-6m

8)-6*n*(-5)=30n

9)5/6*k-(-2/5)=5/6k+2/5

10)2/3*(-n)*1/2 =-1/3n

11)3/8*(-m)*2/3=-1/4m
 12)5/9*(-n)*3/5=-1/3n

Answer 2

1. 8.3 - a + 1.7 = 10 - a
2. 5/9 + b - 1/4 = (20/36) + b - (9/36) = (20 + 36b - 9) / 36 = (11 + 36b) / 36
3. 13.5 + x - 1.5 - 13.5 = x - 1.5
4. 5/6 + y - 5/6 + 1/6 = (10/12) + y - (10/12) + (2/12) = (10 + 12y - 10 + 2) / 12 = (12y + 2) / 12 = (6y + 1) / 6
5. 48.5 - m + 1.5 - 48.5 = -m + 1.5
6. n + 5/9 - 8 - 5/9 = n - 8
7. 2 * m * (-3) = -6m
8. -6 * n * (-5) = 30n
9. 5/6 * k - (-2/5) = (25/30) * k + (12/30) = (5k + 12) / 6
10. 2/3 * (-n) * 1/2 = -n/3
11. 3/8 * (-m) * 2/3 = -m/12
12. 5/9 * (-n) * 3/5 = -n/3