House of Hundreds - I
Class 3 · Mathematics
4 ideas in Class 3 Mathematics, explained in plain words, with games and quizzes to practise.
Counting Past Two Hundred
Part of: Numbers to 400
Counting past 200 runs in tens: 200, 210 up to 280, then 298, 299 and 300. Torans hold 200 plus 50, which is 250, and bangles hold 200 plus 80, which is 280.
Why it matters. Crossing hundreds removes fear of big numbers. Children see the same tens pattern repeat in every hundred.
Try it in two minutes
- Count aloud in tens from 200 to 300.
- Stop at 298 and add 1 twice: 299, 300.
- Ask: how many more than 250 reach 300?
Try at home. Count spoons in tens up to 100, then say what 100 plus 50 would be.
Hundreds in Words and Parts
Part of: Numbers to 400
Every hundred-number splits two ways: 235 is 200 and 35 more, and also 15 less than 250. Its name, two hundred thirty-five, says the same split aloud.
Why it matters. Splits make big numbers friendly. Names and parts together fix place value for hundreds.
Try it in two minutes
- Write 235 and split it as 200 and 35.
- Split it again as 15 less than 250.
- Read the name aloud together.
Try at home. Split 316 as 300 and more, then read its name.
Sliding on the Number Line
Part of: Numbers to 400
A slider moves any number: 285 plus 1 is 286, 147 plus 10 is 157, 367 take away 2 is 365, and 290 plus 20 is 310. The flag game guesses hidden numbers from too-low and too-high hints.
Why it matters. Sliding by 1s, 2s, 10s and 20s builds flexible jumps. Guessing games turn the number line into play.
Try it in two minutes
- Stand on 285 and step 1 ahead: 286.
- Stand on 147 and jump 10 ahead: 157.
- Guess a hidden number from high and low hints.
Try at home. Slide 289 back by 10 and say where you land.
Letter Count Magic
Part of: Numbers to 400
Write any number name and count its letters: six has 3, eleven has 6, twenty-three has 11. Keep chaining and every road ends at four, because four has 4 letters.
Why it matters. Letter chains show that rules always land somewhere. Counting letters also sharpens spelling of number names.
Try it in two minutes
- Write SIX and count its letters: 3.
- Write THREE and count: 5, then FIVE counts 4.
- Start from any number and chase it to FOUR.
Try at home. Chain your age's number name until it reaches four.
What your child will practise
- Counting Past Two Hundred: Ocean Quick Fire (Quick Fire)
- Hundreds in Words and Parts: Jungle Quick Fire (Quick Fire)
- Hundreds in Words and Parts: Treasure Quest (Match It Up)
- Letter Count Magic: Number Sort (Sort It Out)
- Sliding on the Number Line: Desert Puzzle (Clue Puzzle)
- Quiz: Counting Past Two Hundred (8 questions)
- Quiz: Hundreds in Words and Parts (8 questions)
- Quiz: Letter Count Magic (8 questions)
- Quiz: Sliding on the Number Line (8 questions)