Solve this problem.
Brianna paid $18.89 for a pair of sandals. She bought a pair of hiking boots that cost $12 more than her sandals. How much did Brianna pay for the two pairs of shoes?
How can estimation be used to make sure the answer is reasonable?
A.
Answer: Brianna paid $42.89.
Estimation: $19 + $12 = $31
$31 + $12 = $43
Brianna paid about $43 for the shoes.
B.
Answer: Brianna paid $25.78.
Estimation: $19 - $12 = $7
$19 + $7 = $26
Brianna paid about $26 for the shoes.
C.
Answer: Brianna paid $49.78.
Estimation: $19 + $12 = $31
$31 + $19 = $50
Brianna paid about $50 for the shoes.
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