| Class 6 Maths Whole Numbers | Operation on a number line |
Operation on a number line
Addition
Add 2 and 5. i.e 2 + 5
Start from 0, 2 jumps towards right. You reach at 2.
Start from 2, 5 jumps towards right. You reach at 7.
Therefore, 2 + 5 = 7
Subtraction
Subtract 4 from 7. i.e 7 - 4
Start from 0, jump directly to 7.
Start from 7, 4 jumps towards left. You reach at 3.
Multiplication
Example i.e 3 x 2
Multiplication means repeated addition. Since 3 x 2 means 3 added twice.
Start from 0. Make 2 jumps (each jump of 3 units).You reach at 6.
Question: Find (a) 3 × 3; (b) 4 × 2 using the number line.
Solution:
(a) Start from 0. Make 1 jump of 3 steps towards right. You reach at 3.
Start from 3. Make 1 jump of 3 steps towards right. You reach at 6.
Start from 6. Make 1 jump of 3 steps towards right. You reach at 9.
Therefore, 3 x 3 = 9
(b) Start from 0. Make 1 jump of 4 steps towards right. You reach at 4.
Start from 4. Make 1 jump of 4 steps towards right. You reach at 8.
Therefore, 4 x 2 = 8
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