Mathematics: Class 1 — Chapter 8: Fun with Numbers

When counting a large number of items, we can group them into sets of $10$:

• Each box or group holds exactly 10 items (one ten).
• Loose items represent ones.
• For example, $2$ boxes of $10$ oranges and $1$ loose orange make $20 + 1 = 21$ (Twenty One).
• $2$ boxes of $10$ oranges and $2$ loose oranges make $20 + 2 = 22$ (Twenty Two).

A tens frame is a grid of $10$ spaces ($2 \times 5$) used to visualize numbers:

• Two fully filled tens frames represent $20$.
• An additional partially filled frame represents the ones place.
• Example: Two full frames and $3$ dots in the third frame represent $23$ (Twenty Three).

Practice writing and recognizing numbers from $21$ to $30$:

• $21$ - Twenty One
• $22$ - Twenty Two
• $23$ - Twenty Three
• $24$ - Twenty Four
• $25$ - Twenty Five
• $26$ - Twenty Six
• $27$ - Twenty Seven
• $28$ - Twenty Eight
• $29$ - Twenty Nine
• $30$ - Thirty ($3$ tens and $0$ ones)

• Garlands of Flowers: $3$ garlands of $10$ flowers and $1$ loose flower make $31$ (Thirty One).
• Bundles of Sticks: $4$ bundles of $10$ sticks and $1$ loose stick make $41$ (Forty One).

A ginladi is a string of beads grouped in tens (often alternating colors) used to identify and place numbers from $1$ to $50$ (and up to $99$).

• It helps in understanding the relative position of numbers.
• It is useful for counting backwards and forwards.

• $5$ bundles of $10$ and $1$ loose stick = $51$ (Fifty One)
• $5$ bundles of $10$ and $5$ loose sticks = $55$ (Fifty Five)
• $6$ bundles of $10$ = $60$ (Sixty)

• $6$ bundles and $1$ loose stick = $61$ (Sixty One)
• $7$ bundles of $10$ = $70$ (Seventy)
• $7$ bundles and $1$ loose stick = $71$ (Seventy One)
• $8$ bundles of $10$ = $80$ (Eighty)

• $8$ bundles and $1$ loose stick = $81$ (Eighty One)
• $9$ bundles of $10$ = $90$ (Ninety)
• $9$ bundles and $9$ loose sticks = $99$ (Ninety Nine)
• $10$ bundles of $10$ = $100$ (One Hundred)

A grid-based board game from $1$ to $100$ where players fill in missing numbers to complete the path. This game helps practice number sequencing and order.

Matchbox Estimation: Collect small items (like seeds, beads, or matchsticks) and estimate how many items a single matchbox can hold. Count them to verify your estimation.

Warli painting is a beautiful folk art style from Maharashtra, India, that uses simple geometric shapes like circles, triangles, and lines to represent people, animals, and daily life scenes.

• Observe how many people, houses, and trees are drawn using basic lines and shapes.
• Practice creating your own Warli drawings using these geometric patterns.