Question

-25 1/2:(-4)+11 9/10 : 14-12,7:(-10)

Answer 1

Ответ:

1)6,375;

2)0,85;

3) -1,27;

4) 7,225;

5)

8,495.

Answer 2

-25(1/2)÷(-4)+11(9/10)÷14-12,7÷(-10)=8,495

1) -25(1/2)÷(-4)=(-51/2)×(-1/4)=(51/2×4)=51/8;

2) 11(9/10)÷14=(119/10)÷14=(119/10)×(1/14)=119/140=17/20;

3) 12,7÷(-10)=(127/10)×(-1/10)=(-127/100)=-1,27;

4) (51/8)+(17/20)=(51×20+17×8)/160=(1020+136)/160=1156/160=7,225

5) 7,225-(-1,27)=7,225+1,27=8,495.

Answer 3

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

-25 1/2 : (-4) First, let's convert the mixed number -25 1/2 to an improper fraction: -25 1/2 = -51/2

Now, we can divide -51/2 by -4: (-51/2) / (-4) = (-51/2) * (-1/4) [Dividing by a negative number is equivalent to multiplying by its reciprocal] = (51/2) * (1/4) [Negatives cancel out] = 51/8

Next part of the expression:

11 9/10 : 14-12,7 : (-10) Let's simplify the expression within the parentheses first: 14 - 12.7 = 1.3

Now, we can divide 11 9/10 by 1.3: 11 9/10 / 1.3 = (119/10) / (13/10) = (119/10) * (10/13) [Dividing by 1.3 is equivalent to multiplying by its reciprocal] = 119/13

Finally, we have: 51/8 + 119/13

To add these fractions, we need to find a common denominator. The least common multiple (LCM) of 8 and 13 is 104. Let's convert the fractions:

51/8 = (51 * 13) / (8 * 13) = 663/104 119/13 = (119 * 8) / (13 * 8) = 952/104

Now, we can add the fractions: 663/104 + 952/104 = (663 + 952) / 104 = 1615/104

Therefore, the simplified value of the expression -25 1/2 : (-4) + 11 9/10 : 14-12,7 : (-10) is 1615/104.