Shannon bought three dozen party favors for $1.24 each. To estimate the total cost she thought of 36 as 9x4, and she thought of $1.24 as $1.25. Then she multiplied the three numbers.
AWhat was Shannon's estimate of the cost?
BTo find the cost quickly, which two numbers should she multiply first?
AWhat was Shannon's estimate of the cost?
BTo find the cost quickly, which two numbers should she multiply first?