Question

-6,3:9-(0,9); 2,4:(-0,8); -15,5:5; -8,7:(-3); -9,3:(-3.1): -8:(-1,6); 9:(-5); 3,57:(0,7); -9:0,15; 3,2:(-8) -5,4:(-3); -270:(-5)

Answer 1

1)0,63
2)-3
3)-3,1
4)2,9
5)3
6)5
7)-1,8
8)5,1
9)-60
10)-0,4
11)1,8
12)54

Answer 2

To solve this expression, let's break it down step by step:

1. First, let's simplify the expressions in the parentheses:

-6,3:9 - (0,9) = -6.3/9 - 0.9 2,4:(-0,8) = 2.4/(-0.8) -15,5:5 = -15.5/5 -8,7:(-3) = -8.7/(-3) -9,3:(-3.1) = -9.3/(-3.1) -8:(-1,6) = -8/(-1.6) 9:(-5) = 9/(-5) 3,57:(0,7) = 3.57/0.7 -9:0,15 = -9/0.15 3,2:(-8) + -5,4:(-3) = 3.2/(-8) + (-5.4)/(-3) -270:(-5) = -270/(-5)

2. Now, let's substitute the decimal numbers with their equivalent fractions:

-6.3/9 - 0.9 = -63/10 - 9/10 2.4/(-0.8) = 12/5 -15.5/5 = -31/10 -8.7/(-3) = 87/30 -9.3/(-3.1) = 93/31 -8/(-1.6) = 5 9/(-5) = -9/5 3.57/0.7 = 357/70 -9/0.15 = -60 3.2/(-8) + (-5.4)/(-3) = -4/5 + 18/5 -270/(-5) = 54

3. Now, let's perform the calculations:

-63/10 - 9/10 = -72/10 = -36/5 12/5 = 12/5 -31/10 = -31/10 87/30 = 29/10 93/31 = 93/31 5 = 5 -9/5 = -9/5 357/70 = 51/10 -60 = -60 -4/5 + 18/5 = 14/5 54 = 54

4. Finally, let's put the results together:

-36/5; 12/5; -31/10; 29/10; 93/31; 5; -9/5; 51/10; -60; 14/5; 54

So the final answer to the given expression is: -36/5; 12/5; -31/10; 29/10; 93/31; 5; -9/5; 51/10; -60; 14/5; 54