How do you evaluate $21 - 1 \times 2 \div 4$ $21 - 1 xx 2 ÷ 4$ ?

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How do you evaluate $21 - 1 \times 2 \div 4$ $21 - 1 xx 2 ÷ 4$ ?

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Answer 1 · 2018-05-14T19:40:54

$20 \frac{1}{2}$ $20 1/2$

Explanation:

PEMDAS

first we go left to right and do multiplication and division

$1 \times 2 = 2$ $1xx2=2$
$2 \div 4 = \frac{1}{2}$ $2÷4=1/2$
then going left to right again and doing all addition and subtraction
$21 - \frac{1}{2} = 20 \frac{1}{2}$ $21-1/2=20 1/2$

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How do you evaluate $21 - 1 \times 2 \div 4$ $21 - 1 xx 2 ÷ 4$ ?

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How do you evaluate $21 - 1 \times 2 \div 4$ $21 - 1 xx 2 ÷ 4$ ?