Addition and Substraction of Decimal Numbers
Add 0.5 and 0.4
Take a circle and divide it into 10 equal parts
Shade 5 equal parts to represent 0.5
Shade 4 equal parts to represent 0.4
Now count the total number of shaded tenths in the circle.
| Ones | Tenths |
|---|---|
| 0 . | 5 |
| 0 . | 4 |
| 0 . |
Therefore 0.5 + 0.4 =
Thus, we can add decimal in such a manner that tenth part will add to tenth part of the second number. Similarly the hundredth parts would be added together.
Can you now add 0.09 and 0.42?
| Ones | Tenths | Hundredths |
|---|---|---|
| 0 . | 6 | 9 |
| 0 . | 4 | 2 |
Thus 0.69 + 0.54 =