What is 8 1/2+3\times 7-18 ?

The solution to 8 1/2+3\times 7-18 is 11 1/2

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8 1/2+3\times 7-18

8 \frac{1}{2} + 3 \cdot 7 - 18

11 \frac{1}{2}

Solution steps

8 \frac{1}{2} + 3 \cdot 7 - 18

Convert mixed numbers to improper fractions:

8 \frac{1}{2} = \frac{17}{2}

= \frac{17}{2} + 3 \cdot 7 - 18

Follow the PEMDAS order of operations

Multiply and divide (left to right)

3 \cdot 7 : 21

= \frac{17}{2} + 21 - 18

Add and subtract (left to right)

\frac{17}{2} + 21 - 18 : \frac{23}{2}

= \frac{23}{2}

Convert improper fractions to mixed numbers:

\frac{23}{2} = 11 \frac{1}{2}

= 11 \frac{1}{2}

5 \cdot (- 3) + ((8) \div 2) + (15) \div (- 3)

6 3^{2} + 1 6^{2}

9 \times 2 - ((5 \times 6 - 4) - 12)

- 4 (18 \div 2) + (24 \div (4 \times 3))

7^{2} - 6 \times (- 2)