Question

1. -1/5+(-3.7)= 2. -4,08+1/2= 3. 7,2*(-1/2)= 4. 2/15*(-10)= 5. -38,1:(-3/5)= 6. 11,2:(-4/7)=

Answer 1

Ответ:

1.) -3,9 2.) -4,13 3.) -3,6 4.) -4\3 5.) 63,5 6.) -19,6

Answer 2

Let's solve each of these mathematical expressions step by step:

1. -1/5 + (-3.7) = -1/5 - 3.7 (Since adding a negative number is the same as subtracting) = (-1/5) - (37/10) (Converting -3.7 to a fraction with a common denominator of 10) = (-2/10) - (37/10) (Multiplying both fractions by 2/2 to have a common denominator) = (-2 - 37) / 10 (Now that they have the same denominator, you can add the numerators) = -39/10

2. -4.08 + 1/2 = -4.08 + 0.5 (Converting 1/2 to a decimal) = -4.08 + 0.5 = -3.58

3. 7.2 * (-1/2) = 7.2 * (-0.5) (Converting -1/2 to a decimal) = -3.6

4. (2/15) * (-10) = (2/15) * (-10) = -20/15 (Multiply numerator by -10) = -4/3 (Simplify by dividing both numerator and denominator by 5)

5. -38.1 / (-3/5) = -38.1 / (-3/5) (When you divide by a fraction, it's the same as multiplying by its reciprocal) = -38.1 * (-5/3) (Reciprocal of -3/5 is -5/3) = (38.1 * 5) / 3 (Multiply numerators and denominators) = 190.5 / 3 = 63.5

6. 11.2 / (-4/7) = 11.2 / (-4/7) (When you divide by a fraction, it's the same as multiplying by its reciprocal) = 11.2 * (-7/4) (Reciprocal of -4/7 is -7/4) = (11.2 * -7) / 4 (Multiply numerators and denominators) = -78.4 / 4 = -19.6

So, the results are:

1. -39/10
2. -3.58
3. -3.6
4. -4/3
5. 63.5
6. -19.6