Question

1)-72:(-90);2)-2:50;3)-96:(-120);4)-3/7:9/14;5)-5/17:(-25/34)6)-39/64:13/32.​

Answer 1

Ответ:

1.0,8

2.-0, 04

3.0, 8

4.

Answer 2

To simplify the given expressions, let's solve each one step by step:

1. -72 / (-90):

Dividing a negative number by a negative number yields a positive result.

-72 / -90 = 72 / 90 = 4 / 5

Therefore, -72 / (-90) simplifies to 4/5.

2. -2 / 50:

Dividing a negative number by a positive number yields a negative result.

-2 / 50 = -1 / 25

Therefore, -2 / 50 simplifies to -1/25.

3. -96 / (-120):

Dividing a negative number by a negative number yields a positive result.

-96 / -120 = 96 / 120 = 4 / 5

Therefore, -96 / (-120) simplifies to 4/5.

4. -3/7 / 9/14:

To divide fractions, we multiply the first fraction by the reciprocal of the second fraction.

-3/7 ÷ 9/14 = -3/7 × 14/9

Now, we can simplify:

-3/7 × 14/9 = (-3 × 14) / (7 × 9) = -42/63

Both the numerator and denominator are divisible by 21:

-42/63 = -2/3

Therefore, -3/7 / 9/14 simplifies to -2/3.

5. -5/17 / (-25/34):

Dividing a negative number by a negative number yields a positive result.

-5/17 ÷ -25/34 = -5/17 × 34/(-25)

Now, we can simplify:

-5/17 × 34/(-25) = (-5 × 34) / (17 × 25) = -170/425

Both the numerator and denominator are divisible by 5:

-170/425 = -34/85

Therefore, -5/17 / (-25/34) simplifies to -34/85.

6. -39/64 / 13/32:

To divide fractions, we multiply the first fraction by the reciprocal of the second fraction.

-39/64 ÷ 13/32 = -39/64 × 32/13

Now, we can simplify:

-39/64 × 32/13 = (-39 × 32) / (64 × 13) = -1248/832

Both the numerator and denominator are divisible by 16:

-1248/832 = -78/52

Both the numerator and denominator are divisible by 26:

-78/52 = -3/2

Therefore, -39/64 / 13/32 simplifies to -3/2.