In an activity, Dana collected 217 marbles. She collected 7 times as many marbles as Sarah.
- How many marbles did Sarah collect?
- How many more marbles did Dana collect than Sarah?
(a)
Number of marbles that Sarah collected = 1 u
Number of marbles that Dana collected = 7 u = 217
7 u = 217
1 u = 217 ÷ 7 = 31
Number of marbles that Sarah collected
= 1 u
= 31
(b)
Number of marbles that Dana collected more than Sarah
= 217 - 31
= 186
Answer(s): (a) 31; (b) 186