Solve 1+2-3*4div5+6-7*8div9

$$1+2-3 \times 4 \div 5+6-7 \times 8 \div 9$$

Evaluate

$$\frac{17}{45}\approx 0.377777778$$

Solution Steps

Add 1 and 2 to get 3.

$$3-\frac{3\times 4}{5}+6-\frac{7\times 8}{9}$$

Multiply 3 and 4 to get 12.

$$3-\frac{12}{5}+6-\frac{7\times 8}{9}$$

Convert 3 to fraction \frac{15}{5}.

$$\frac{15}{5}-\frac{12}{5}+6-\frac{7\times 8}{9}$$

Since \frac{15}{5} and \frac{12}{5} have the same denominator, subtract them by subtracting their numerators.

$$\frac{15-12}{5}+6-\frac{7\times 8}{9}$$

Subtract 12 from 15 to get 3.

$$\frac{3}{5}+6-\frac{7\times 8}{9}$$

Convert 6 to fraction \frac{30}{5}.

$$\frac{3}{5}+\frac{30}{5}-\frac{7\times 8}{9}$$

Since \frac{3}{5} and \frac{30}{5} have the same denominator, add them by adding their numerators.

$$\frac{3+30}{5}-\frac{7\times 8}{9}$$

Add 3 and 30 to get 33.

$$\frac{33}{5}-\frac{7\times 8}{9}$$

Multiply 7 and 8 to get 56.

$$\frac{33}{5}-\frac{56}{9}$$

Least common multiple of 5 and 9 is 45. Convert \frac{33}{5} and \frac{56}{9} to fractions with denominator 45.

$$\frac{297}{45}-\frac{280}{45}$$

Since \frac{297}{45} and \frac{280}{45} have the same denominator, subtract them by subtracting their numerators.

$$\frac{297-280}{45}$$

Subtract 280 from 297 to get 17.

$$\frac{17}{45}$$

Factor

$$\frac{17}{3 ^ {2} \cdot 5} = 0.37777777777777777$$