Double Century | Maths Grade 3 CBSE

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Six ideas about bigger numbers

Making hundreds, counting in jumps, and going up to 200. Tap each term to see what it means, with an example you can count out loud.

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Ten ones make a ten. Ten tens make a hundred (100).
Count tens: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 — that is a full hundred.
After 99 comes 100. Two hundreds make 200, the “double century”.

Worked example. Aman has 9 bundles of ten marbles and 10 loose marbles. How many marbles?

9 tens = 90, and 10 loose marbles make one more ten. 90 + 10 = 100 marbles.

Skip counting means jumping by the same number each time, so we count faster.
By 2: 2, 4, 6, 8, 10… By 5: 5, 10, 15, 20… By 10: 10, 20, 30… 100, 110, 120…
Skip counting helps us count shoes (by 2s), fingers on hands (by 5s), and bundles (by 10s).

Worked example. Six children each show both hands. How many fingers in all?

Each child shows 10 fingers. Skip count by 10: 10, 20, 30, 40, 50, 60 fingers.

Numbers past 100 have a hundreds place. 134 is 1 hundred, 3 tens and 4 ones.
Read it as “one hundred thirty-four”. 150 is “one hundred fifty”.
To compare, look at the hundreds first, then the tens, then the ones.

Worked example. Which is bigger, 145 or 154?

Both have 1 hundred. Look at tens: 145 has 4 tens, 154 has 5 tens. So 154 is bigger.

Common mix-up: 130 and 103 are not the same. In 130 the 3 is tens (30); in 103 the 3 is ones. Look at the place of each digit.

Where you’ll meet it

A batter reaching 100 makes a century, and 200 is a double century — that's skip counting hundreds!

To count many people fast, we count in tens or fives instead of one by one.

A storybook with 150 pages uses hundreds, tens and ones — and you can find which page is bigger.

Check yourself

Nine friendly questions to check that you can use hundreds and skip counting up to 200 — not just say the numbers.

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