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. Question Resources