How do you simplify $21 - 1 \times 2 \div 4$ $21 - 1 times 2 ÷ 4$ using PEMDAS?

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Answer 1 · 2016-10-13T14:49:25

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

There are two separate terms. Keep them separate until the last line.

$21 - 1 \times \frac{2}{4}$ $color(red)(21)color(blue)(-1xx2/4)$

$=color(red)(21)color(blue)(-cancel2/cancel4^2)$

$=color(red)(21)color(blue)(-1/2)$

= $20 1/2$

How do you simplify 21 - 1 times 2 ÷ 421−1×2÷421 - 1 times 2 ÷ 4 using PEMDAS?