Solve 41/2*-171/2=

$$4 \frac { 1 } { 2 } \times - 17 \frac { 1 } { 2 } =$$

Evaluate

$$-\frac{315}{4}=-78.75$$

Solution Steps

Multiply 4 and 2 to get 8.

$$\frac{8+1}{2}\left(-\frac{17\times 2+1}{2}\right)$$

Add 8 and 1 to get 9.

$$\frac{9}{2}\left(-\frac{17\times 2+1}{2}\right)$$

Multiply 17 and 2 to get 34.

$$\frac{9}{2}\left(-\frac{34+1}{2}\right)$$

Add 34 and 1 to get 35.

$$\frac{9}{2}\left(-\frac{35}{2}\right)$$

Multiply \frac{9}{2} times -\frac{35}{2} by multiplying numerator times numerator and denominator times denominator.

$$\frac{9\left(-35\right)}{2\times 2}$$

Do the multiplications in the fraction \frac{9\left(-35\right)}{2\times 2}.

$$\frac{-315}{4}$$

Fraction \frac{-315}{4} can be rewritten as -\frac{315}{4} by extracting the negative sign.

$$-\frac{315}{4}$$

Factor

$$-\frac{315}{4} = -78\frac{3}{4} = -78.75$$