Question
Determine the sums given below using suitable rearrangement.
$1 + 2 + 3 + 4 + 96 + 97 + 98 + 99$
$1 + 2 + 3 + 4 + 96 + 97 + 98 + 99$
✓
Answer
$1 + 2 + 3 + 4 + 96 + 97 + 98 + 99$
$(1 + 2 + 3 + 4) + (96 + 97 + 98 + 99)$ (Using associative property of addition)
$= (10) + (390)$
$= 400$
$(1 + 2 + 3 + 4) + (96 + 97 + 98 + 99)$ (Using associative property of addition)
$= (10) + (390)$
$= 400$
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