Adding Zero

NCERT anchor: NCERT Joyful Mathematics Class 1 — Chapter 4: Making 10 (zero in addition)

• Understand that adding zero does not change a number.
• Write sums like 7 + 0 = 7 and 0 + 4 = 4 confidently.
• See zero as 'nothing added' — empty plate, no extra runs, no new coins.

1. Zero means nothing added

Level 1 (Verbal): You have 5 marbles. Someone adds zero more. Still 5 marbles.

Level 2 (Symbolic): n + 0 = n and 0 + n = n for any number you know.

Visual: One group has dots; second group is empty — count only the first group.

2. Zero on either side

4 + 0 = 4 and 0 + 4 = 4 — order does not change the result here.

3. Zero is a number

Zero means none, but it is still a useful number on the number line and in sums.

Cricket: no extra runs this ball

Step 1 — Team score is 9 runs.
Step 2 — This ball adds 0 runs (dot ball).
Step 3 — 9 + 0 = 9 — score stays the same.
Step 4 — Check: nothing joined the group → total unchanged.
Answer: still 9 runs.

• What is 6 + 0?
• What is 0 + 10?
• Meera has 8 stickers and gets 0 more. How many now?
• Stretch: True or false: 0 + 0 = 0. Explain in one sentence.

Revision tip: Remember: 'plus zero changes nothing' — say it before every 0-addition problem.

Open the Practice tab for graded questions on Adding Zero.