Solve (21+15)*2-21*1/2*22/7

$$( 21 + 15 ) \times 2 - 21 \times \frac { 1 } { 2 } \times \frac { 22 } { 7 }$$

Evaluate

$$39$$

Solution Steps

Add 21 and 15 to get 36.

$$36\times 2-21\times \frac{1}{2}\times \frac{22}{7}$$

Multiply 36 and 2 to get 72.

$$72-21\times \frac{1}{2}\times \frac{22}{7}$$

Multiply 21 and \frac{1}{2} to get \frac{21}{2}.

$$72-\frac{21}{2}\times \frac{22}{7}$$

Multiply \frac{21}{2} times \frac{22}{7} by multiplying numerator times numerator and denominator times denominator.

$$72-\frac{21\times 22}{2\times 7}$$

Do the multiplications in the fraction \frac{21\times 22}{2\times 7}.

$$72-\frac{462}{14}$$

Divide 462 by 14 to get 33.

$$72-33$$

Subtract 33 from 72 to get 39.

$$39$$

Factor

$$3\times 13$$