Age Problem: John and his sister

easyGrade 3-5age difference

The Problem

John is 28 years old. His sister is 2 years younger than John. How old is his sister?

Answer:

26 years old

Key Information

  • John is 28 years old
  • his sister is 2 years younger

Step-by-Step Solution

1

Identify the given information

John's age = 28 years, Age difference = 2 years
2

Set up the equation

his sister's age = John's age - 2
3

Substitute values

his sister's age = 28 - 2
4

Calculate

28 - 2 = 26
5

Final answer

his sister is 26 years old

Common Mistakes to Avoid

  • Adding instead of subtracting the age difference
  • Confusing who is older or younger

Helpful Tips

  • Read the problem carefully to identify who is older
  • Subtract when someone is younger, add when they are older

Real-World Application

Age problems help understand relationships between ages and develop subtraction skills.

Related Topics:

agesubtractionword problemsbasic math

Need More Help with Word Problems?

Get personalized 1-on-1 tutoring with expert math tutors. Master word problems, build problem-solving skills, and boost your confidence!

Find Your Math Tutor