Question

1/4+(-1/5) 2)-2-(3 7/8)мінус 3 цілих 7 восьмих

Answer 1

Ответ:

1.-9/20

2.-5 7/8 мінус 5 цілих 7 восьмих

Answer 2

Let's break down the expression step by step:

1. Add 1/4 and -1/5:

   1/4 + (-1/5) = (5/20) + (-4/20) = (5 - 4)/20 = 1/20

2. Next, subtract 2 from the result:

   1/20 - 2 = 1/20 - 40/20 = (1 - 40)/20 = -39/20

3. Now, subtract 3 7/8 from the previous result:

   -39/20 - 3 7/8

To subtract a mixed number, convert it to an improper fraction:

3 7/8 = (8 * 3 + 7)/8 = (24 + 7)/8 = 31/8

Now, subtract 31/8 from -39/20:

-39/20 - 31/8

To subtract these fractions, you need a common denominator, which is 40 in this case:

-39/20 = -78/40 (multiply both numerator and denominator by 2)

Now subtract:

-78/40 - 31/8

Now, find a common denominator, which is 40:

-78/40 - 31/8 = -78/40 - 155/40

Now, subtract:

(-78 - 155)/40 = -233/40

So, the final result is -233/40, which can also be expressed as a mixed number:

-233/40 = -5 33/40

So, -39/20 - 3 7/8 is equal to -5 33/40.