$$2 ( 70 \div 9 ) - 20 =$$
$-\frac{40}{9}\approx -4.444444444$
$$\frac{2\times 70}{9}-20$$
$$\frac{140}{9}-20$$
$$\frac{140}{9}-\frac{180}{9}$$
$$\frac{140-180}{9}$$
$$-\frac{40}{9}$$
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$-\frac{40}{9} = -4\frac{4}{9} = -4.444444444444445$
