Fun at Class Party! | Maths Grade 3 CBSE

Play with it

Six ideas about data

Counting with tally marks and reading picture charts. Tap each term to see what it means, with a party example you can picture.

Explore · Party datatap a term

Learn

Data is the bits we collect by asking or counting — like everyone's favourite snack.
Tally marks help us keep count. Draw one line for each, and cross every fifth one.
A crossed bundle is 5, so counting in fives is fast: bundle, bundle, then loose lines.

Worked example. Seven children clap. How do we show 7 in tally marks?

One bundle of 5 (four lines crossed) and 2 more lines: 5 + 2 = 7.

A pictograph shows data with little pictures. One picture stands for one thing (or a set number).
If one 🍎 means 1 apple, then four 🍎 mean 4 apples. Count the pictures to read the number.
Each row gets a label, so we can see which snack got the most pictures.

Worked example. One ⭐ means 2 stickers. How many is ⭐⭐⭐?

Each star is 2, so 3 stars mean 2 + 2 + 2 = 6 stickers.

The biggest count is the most liked; the smallest count is the least liked.
Add all the counts to find the total number of children.
Subtract two counts to find how many more chose one snack than another.

Worked example. Cake 8, samosa 5, fruit 3. How many children in all, and how many more chose cake than fruit?

Total = 8 + 5 + 3 = 16. Cake more than fruit = 8 − 3 = 5.

Common mix-up: always check what one picture means. If one ⭐ stands for 2, then 3 stars are 6, not 3.

Where you’ll meet it

Ask your friends their favourite game and tally the answers to find which game wins.

Marking sunny, cloudy and rainy days with pictures shows how the weather changed in a month.

Counting how many came each day with tally marks helps the teacher see the busiest day.

Check yourself

Nine friendly questions to check that you can use data — tally marks, pictographs and reading a chart — not just look at it.

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