Class 3 (SSC) • Mathematics (गणित)Chapter 2: Addition and Subtraction (3-digit)⭐ Topic 2
Practice and Revision - Addition and Subtraction (3-digit)
Let us practise and revise what we learned about addition and subtraction (3-digit). We learn to add and subtract 3-digit numbers, using reg
1
Know it
Step 1 of 3
2
See the pattern
Step 2 of 3
3
Try it out
Step 3 of 3
Fun picture
Try it now
Learn the idea step by step
1
Know it
Adding 3-digit numbers follows the same regrouping rules as 2-digit numbers, carrying over when a column's sum is 10 or more.
Quick revision
Remember these!
- 3-digit addition uses same regrouping rules.
- Carry over when column sum is 10+.
- Example: 456+278=734 (with carrying).
- 3-digit subtraction uses borrowing.
- Borrow when top digit is smaller.
- Start from the ones column.
- Regrouping ensures accurate calculations.
- Practice builds confidence for complex problems.
Words to know
addition and subtraction (3-digit)ssc class 3