Question
$125 + (68 + 17) = (125 + $______ $) + 17$
✓
Answer
$125 + (68 + 17) = (125 + 68) + 17$
Solution: If $a, b$ andc are three whole numbers,
then $a + (b + c) = (a + b) + c [$by associative property$]$
Solution: If $a, b$ andc are three whole numbers,
then $a + (b + c) = (a + b) + c [$by associative property$]$
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