Write the following decimal numbers as rationals.
0.25

Write the following decimal numbers as rationals.
0.666…

Find which rational number is greater?
\(\frac { 5 }{ -4 } ,\frac { -11 }{ -7 } \)

Find which rational number is greater?
\(\frac { -10 }{ 3 } ,\frac { 14 }{ -5 } \)

Simplify \(\left( \frac { -16 }{ 5 } \times \frac { 20 }{ 8 } \right) -\left( \frac { 15 }{ 5 } \times \frac { -35 }{ 3 } \right) \)

Simplify \(\left( \frac { -16 }{ 5 } \times \frac { 20 }{ 8 } \right) -\left( \frac { 15 }{ 5 } \times \frac { -35 }{ 3 } \right) \div \left( \frac { 11 }{ 16 } +\frac { 4 }{ 8 } \right) \)

Simplify \(=\frac { -12 }{ 10 } +\left( \frac { -90 }{ 15 } \right) -\left( \frac { 3 }{ 8 } \right) \)

Simplify \(\left( \frac { -7 }{ 18 } \times \frac { 15 }{ -7 } \right) -\left( 1\times \frac { 1 }{ 4 } \right) +\left( \frac { 1 }{ 2 } \times \frac { 1 }{ 4 } \right) \)

Evaluate \(\frac { 6 }{ 7 } -2+\frac { -7 }{ 9 } +\frac { 19 }{ 21 } \)

Verify associative property for addition of rational numbers for \(a=\frac{5}{6}, b=\frac{-3}{4},c=\frac{4}{7}\)