Question
Find the sum by short method:
$10578 + 99999$
$10578 + 99999$
✓
Answer
$10578 + 99999$
$= 10578 + (100000 - 1)$
$= (10578 + 100000) - 1$ (Using associative property of addition)
$= 110578 - 1$
$= 110577$
$= 10578 + (100000 - 1)$
$= (10578 + 100000) - 1$ (Using associative property of addition)
$= 110578 - 1$
$= 110577$
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