Class 2 (CBSE) • MathematicsChapter 3: Fun with Numbers⭐ Topic 1
Addition of Two-Digit Numbers
We learn to add two-digit numbers together, like 23 + 45, using tens and ones.
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Know it
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See the pattern
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Try it out
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Fun picture
Try it now
Learn the idea step by step
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Know it
To add two-digit numbers, we add the ones digits first, then add the tens digits. For 23 + 45: ones are 3+5=8, tens are 2+4=6, giving us 68.
Quick revision
Remember these!
- Add ones digits first, then tens digits.
- 23 + 45 = 68 (ones: 3+5=8, tens: 2+4=6).
- Sometimes we need to carry over to the tens place.
- 27 + 15 = 42, carrying over from the ones place.
- Objects or number lines can help check addition.
- Carrying happens when ones digits add to more than 9.
- Two-digit addition helps solve real-life problems.
- Practice makes carrying over easier to understand.
Words to know
addition of two-digit numbers