Question

cuanto es
$2 \times 5 + 10 - 4$
$5 \times 4$
$5 \times 4 + 1$


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Answer 1

$2 \times 5 = 10 + 10 = 20 - 4 = 16$

$5 \times 4 = 20$

$5 \times 4 = 20 + 1 = 21$

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