Counting 1 to 20

NCERT anchor: NCERT Joyful Mathematics Class 1 — Chapter 1: Finding the Furry Cat! (counting objects)

• Say and write numbers from 1 to 20 in correct order.
• Count objects one by one — mangoes, pencils, cricket balls — without skipping or double-counting.
• Match spoken numbers to numerals and read a simple number line up to 20.
• Use counting in everyday Indian settings: school assembly lines, Diwali diyas, and ₹ coins.

1. Counting one by one

Level 1 (Verbal): Touch each object and say 1, 2, 3… aloud without skipping.

Level 2 (Symbolic): Match the last number you say to the numeral (12 mangoes → 12).

Visual: Draw dots in a row and count left to right; each dot gets exactly one number.

2. Number order 1–20

1 is the first counting number in this set; 20 is the largest we learn here. On a school bus, children count seats: 1, 2, 3… up to 20.

3. Reading and writing numerals

Teen numbers (11–19) use 1 ten plus ones. 14 = 1 ten and 4 ones — write 14, not 41.

4. Zero is not in 1–20 here

We count things from 1. Zero means none — an empty lunch box has 0 rotis, but we do not count rotis starting at zero.

Counting mangoes at the sabzi stall

Step 1 — Point to each mango and say one number: 1, 2, 3…
Step 2 — Stop when every mango has been touched once.
Step 3 — The last number you say is the total (e.g. 14 mangoes → 14).
Step 4 — Write the numeral 14 and say "fourteen mangoes."
Step 5 — Check: count again backwards from 14 to 1 — same total ✓

• Count the fingers on both hands. What number do you reach?
• Which is bigger: 9 or 11? How do you know?
• Meera counts 8 rupee coins in her piggy bank. Show 8 with dots.
• Stretch: Ravi counts 15 cricket balls, then finds 3 more in a bag. What number comes after 15 three times? What is the new total?

Revision tip: Trace numbers 1–20 on a chart daily; say each number name while pointing to objects at home.

Open the Practice tab for graded questions on Counting 1 to 20.