Solve 1-2*0.4*1-2*0.4/2*0.4*2*0.4*1+0.2

$$\frac { 1 - 2 \times 0.4 \times 1 - 2 \times 0.4 } { 2 \times 0.4 \times 2 \times 0.4 \times 1 + 0.2 }$$

Evaluate

$$-\frac{5}{7}\approx -0.714285714$$

Solution Steps

Multiply 2 and 0.4 to get 0.8.

$$\frac{1-0.8\times 1-2\times 0.4}{2\times 0.4\times 2\times 0.4\times 1+0.2}$$

Multiply 0.8 and 1 to get 0.8.

$$\frac{1-0.8-2\times 0.4}{2\times 0.4\times 2\times 0.4\times 1+0.2}$$

Subtract 0.8 from 1 to get 0.2.

$$\frac{0.2-2\times 0.4}{2\times 0.4\times 2\times 0.4\times 1+0.2}$$

Multiply 2 and 0.4 to get 0.8.

$$\frac{0.2-0.8}{2\times 0.4\times 2\times 0.4\times 1+0.2}$$

Subtract 0.8 from 0.2 to get -0.6.

$$\frac{-0.6}{2\times 0.4\times 2\times 0.4\times 1+0.2}$$

Multiply 2 and 0.4 to get 0.8.

$$\frac{-0.6}{0.8\times 2\times 0.4\times 1+0.2}$$

Multiply 0.8 and 2 to get 1.6.

$$\frac{-0.6}{1.6\times 0.4\times 1+0.2}$$

Multiply 1.6 and 0.4 to get 0.64.

$$\frac{-0.6}{0.64\times 1+0.2}$$

Multiply 0.64 and 1 to get 0.64.

$$\frac{-0.6}{0.64+0.2}$$

Add 0.64 and 0.2 to get 0.84.

$$\frac{-0.6}{0.84}$$

Expand \frac{-0.6}{0.84} by multiplying both numerator and the denominator by 100.

$$\frac{-60}{84}$$

Reduce the fraction \frac{-60}{84} to lowest terms by extracting and canceling out 12.

$$-\frac{5}{7}$$

Factor

$$-\frac{5}{7} = -0.7142857142857143$$