Decoration for Festival
Class 2 · Mathematics
4 ideas in Class 2 Mathematics, explained in plain words, with games and quizzes to practise.
Tens and Ones Add Up
Part of: Adding and taking away
Flowers bunch in garlands of ten, so 12 plus 53 means 1 ten plus 5 tens and 2 ones plus 3 ones: 6 tens and 5 ones, which is 65.
Why it matters. Tens-first adding beats counting every flower. It is the standard way to add big numbers.
Try it in two minutes
- Bundle 12 sticks as 1 ten and 2 ones.
- Bundle 53 sticks as 5 tens and 3 ones.
- Join tens with tens and ones with ones: 65.
Try at home. Add 20 beads and 43 beads by grouping tens and ones.
Jumps on the Number Line
Part of: Adding and taking away
The number line turns sums into jumps: 57 plus 34 jumps 30 to land on 87, then 4 more to reach 91. When ones cross ten, like 6 plus 7 is 13, one ten shifts over.
Why it matters. Jumping by tens is fast mental maths. Carrying tens unlocks every column sum.
Try it in two minutes
- Stand on 25 and jump 10 to 35, then 2 more to 37.
- Add 36 and 47: ones make 13, shift 1 ten over.
- Read the result: 8 tens and 3 ones, which is 83.
Try at home. Show 57 plus 34 as a jump of 30 and then 4 on a floor line.
Taking Away on the Line
Part of: Adding and taking away
Taking away walks backwards: 75 diyas take away 35 sold leaves 40. Count 35 steps back, or jump 30 then 5.
Why it matters. Backward jumps mirror forward ones. Children who jump both ways truly own addition and subtraction.
Try it in two minutes
- Hang 75 beads and slide 35 away.
- Count what stays: 40.
- Say: 75 take away 35 is 40.
Try at home. Start at 32 beads, take 12 away, and count the rest.
Opening a Garland to Subtract
Part of: Adding and taking away
For 46 take away 18, 6 ones cannot give 8, so open one garland: 3 tens and 16 ones. Then 16 take away 8 is 8 and 3 tens take away 1 ten is 2 tens: 28.
Why it matters. Opening a ten is borrowing made visible. Garlands show where the extra ones come from.
Try it in two minutes
- Show 46 as 4 garlands and 6 loose flowers.
- Open 1 garland to get 16 loose flowers.
- Give 18 away and count: 28 stay.
Try at home. Show 54 take away 28 by opening one ten of beads.
What your child will practise
- Jumps on the Number Line: Ocean Quest (Flip and Match)
- Jumps on the Number Line: Space Quest (Collect the Answer)
- Opening a Garland to Subtract: Desert Quick Fire (Quick Fire)
- Taking Away on the Line: Space Puzzle (Clue Puzzle)
- Tens and Ones Add Up: Animal Parade Quest (Match It Up)
- Quiz: Jumps on the Number Line (8 questions)
- Quiz: Opening a Garland to Subtract (8 questions)
- Quiz: Taking Away on the Line (8 questions)
- Quiz: Tens and Ones Add Up (8 questions)