Trip Chips
Solution
They ate 51 bags of chips on their trip.
Explanation
Step 1
Use the clues to find out how many bags of chips the scouts had left. Make a list or fill in a chart to keep track of the information.
Add up the total for each kind of chips to see how many bags were left in all.
| Kind of chip | How many boxes? | How many bags left over? | Total |
|---|---|---|---|
| Potato chips | 2 | 3 | 23 |
| Nacho chips | 1 | 0 | 10 |
| Barbecue chips | 0 | 6 | 6 |
| Total | 3 | 9 | 39 |
Another way to keep track of the information:
| Draw | Number |
|---|---|
Potato chips  |
23 |
Nacho chips |
10 |
Barbecue chips |
6 |
| Add to find how many bags of chips are left over: 23 + 10 + 6 = |
39 |
Step 2
To find out how many they had at first:
Think: They had 9 boxes with 10 bags in each box to start.
That means 90 bags to start.
To find out how many they ate, subtract:
90 − 39 = 51
They ate 51 bags of chips on their trip.