Let me work through each problem step by step.
Problem 1:
- First number: I see 3 tall rods (each rod = 10) and 4 small cubes (each cube = 1)
- 3 rods = 30
- 4 cubes = 4
- Total = 34
- Second number: I see 2 tall rods
- 2 rods = 20
- So the addition is: 34 + 20
Problem 2:
- First number: I see 5 tall rods and 7 small cubes
- 5 rods = 50
- 7 cubes = 7
- Total = 57
- Second number: I see 3 tall rods
- 3 rods = 30
- So the addition is: 57 + 30
Problem 3:
- First number: I see 4 tall rods and 6 small cubes
- 4 rods = 40
- 6 cubes = 6
- Total = 46
- Second number: I see 4 tall rods
- 4 rods = 40
- So the addition is: 46 + 40
Final Answer:
- Problem 1:
34 + 20
- Problem 2:
57 + 30
- Problem 3:
46 + 40
Parent Tip: Review the logic above to help your child master the concept of addition models.
