Let’s solve each problem step by step, following the pattern shown in the examples.
---
Examples Recap:
a.
`5 + ▲ = 12` → To find ▲, subtract: `12 - 5 = 7` → So
▲ = 7
b.
`▼ × 3 = 18` → To find ▼, divide: `18 ÷ 3 = 6` → So
▼ = 6
c.
`10 - ■ = 4` → To find ■, subtract: `10 - 4 = 6` → So
■ = 6
>
Pattern: In each case, we isolate the symbol by performing the inverse operation:
> - For addition → subtract
> - For multiplication → divide
> - For subtraction → subtract (minuend minus difference)
---
Now solve the Evaluation Problems:
---
####
1. 2 + □ = 5
This is addition. To find □, subtract 2 from 5:
>
□ = 5 - 2 = 3
✔ Answer: 3
---
####
2. 4 × ▮ = 16
This is multiplication. To find ▮, divide 16 by 4:
>
▮ = 16 ÷ 4 = 4
✔ Answer: 4
---
####
3. 9 - ▲ = 2
This is subtraction. To find ▲, subtract 2 from 9:
>
▲ = 9 - 2 = 7
✔ Answer: 7
---
✔ Final Answers:
1.
3
2.
4
3.
7
These follow the same logic as the examples — using inverse operations to solve for the unknown symbol.
Parent Tip: Review the logic above to help your child master the concept of open sentence math worksheet.
