Find the sum by short method: 6784 + 9999 - Vidyadip

Question

Find the sum by short method:
$6784 + 9999$

✓

Answer

$6784 + 9999$
$= 6784 + (10000 - 1)$
$= (6784 + 10000) - 1$ (Using associative property of addition)
$= 16784 - 1$
$= 16783$

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