Question

Найдите значение выражения -2 5/8:1 3/4+(-8,7-(-2,3)):0,8-2 2/3•(-0,6). СРОЧНО НУЖНО

Answer 1

-2 5/8÷1 3/4+(-8,7-(-2,3))÷0,8-2 2/3×(-0,6)=-7,9
1)-8,7-(-2,3)=-8,7+2,3=-6,4
2)-2 5/8÷1 3/4=-21/8÷7/4=-21/8×4/7=-3/2×1=-3/2=-1 1/2
3)-6,4÷0,8=-8
4)2 2/3×(-0,6)=-8/3×6/10=-8/3×3/5=-8×1/5=-8/5=-1 3/5
5)-1 1/2+(-8)=-1 1/2-8=-9 1/2
6)-9 1/2-(-1 3/5)=-9 5/10+1 6/10=1,6-9,5=-7,9

Answer 2

Calculating the Expression -2 5/8:1 3/4 (-8,7-(-2,3)):0,8-2+2/3•(-0,6)

To calculate the given expression, we'll break it down step by step.

1. Calculate -2 5/8:1 3/4: - To calculate -2 5/8 divided by 1 3/4, we first convert the mixed numbers to improper fractions. - -2 5/8 as an improper fraction is -21/8, and 1 3/4 as an improper fraction is 7/4. - So, -2 5/8 divided by 1 3/4 is equal to -21/8 divided by 7/4. - The result is obtained by multiplying the first fraction by the reciprocal of the second fraction. - Therefore, the result is -3.

2. Calculate (-8,7-(-2,3)): - The expression (-8,7-(-2,3)) can be simplified as (-8.7 - (-2.3)). - This simplifies to -8.7 + 2.3, which equals -6.4.

3. Calculate 0,8-2+2/3•(-0,6): - First, we calculate 2/3 multiplied by -0.6, which equals -0.4. - Then, we add -2 to the result, which equals -2.4. - Finally, we subtract -2.4 from 0.8, which equals 3.2.

Therefore, the value of the given expression -2 5/8:1 3/4 (-8,7-(-2,3)):0,8-2+2/3•(-0,6) is 3.2.