Riley had 21 green marbles. Then she bought 5 bags of blue marbles. There were 9 marbles in each bag. How many marbles does Riley have now?
Select.
A) 23  B) 49  C) 60  D) 41  E) 66
Step 1: Find the number of blue marbles.   5 × 9 = 45   Step 2: Find the total number of green and blue marbles.   21 + 45= 
<gadget id="calculator">21 + 45</gadget>
<output>66</output>
66   Riley has 66 marbles.   Answer is 66.
<result>E</result>
Riley had 21 green marbles. Then she bought 5 bags of blue marbles. There were 9 marbles in each bag. How many marbles does Riley have now?