Let’s solve each problem one by one using the bar model. We’ll think step by step and check our work.
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Problem 1: Rachel has 16 candies. Mike has 4 more candies than Rachel.
We know:
- Rachel = 16
- Mike = Rachel + 4 → so Mike = 16 + 4 =
20
In the bar model, the top bar (Mike) is split into two parts: one part equals Rachel’s amount (16), and the extra part is 4. So the total for Mike is 16 + 4 = 20.
✔ The “?” in Mike’s bar should be
20.
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Problem 2: Jacob has 18 crayons. Mia has 5 fewer crayons than Jacob.
We know:
- Jacob = 18
- Mia = Jacob - 5 → so Mia = 18 - 5 =
13
In the bar model, Mia’s bar is shorter than Jacob’s by 5. So if Jacob’s bar is 18, then Mia’s bar is 18 minus 5.
✔ The “?” in Mia’s bar should be
13.
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Problem 3: Maria has 6 fewer toys than Oliver. Maria has 12 toys.
We know:
- Maria = 12
- Maria = Oliver - 6 → so Oliver = Maria + 6 = 12 + 6 =
18
In the bar model, Maria’s bar is 12, and it’s 6 less than Oliver’s. So Oliver’s bar must be 12 + 6.
✔ The “?” in Oliver’s bar should be
18.
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Problem 4: Mia bought 7 fewer items than Daniel. Daniel bought 15 items.
We know:
- Daniel = 15
- Mia = Daniel - 7 → so Mia = 15 - 7 =
8
In the bar model, Mia’s bar is shorter by 7 compared to Daniel’s. So we subtract 7 from 15.
✔ The “?” in Mia’s bar should be
8.
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Final Answer:
20, 13, 18, 8
Parent Tip: Review the logic above to help your child master the concept of bar models math worksheet.
