Topics
The Fish Tale
- The Fish Tale
- Properties of a Square
- Basic Concepts of Triangles
- Measurement of Length (CM, Meter, Kilometer)
- Measurement of Weight (Gram, Kilogram)
- Measurement of Height
- Measurement of Depth (Feet)
- Speed, Distance and Time
- Introducing a 5 Digit Number - 10,000
- Introducing the Six Digit Number - 1,00,000
- Introducing seven-digit numbers
- Crores
- Relation Between Money and Weight
- Calculation of Interest
- Basic Concepts of Profit and Loss
Math Magic
Shapes and Angles
How Many Squares?
Parts and Wholes
- Concept of Fraction
- Mathematical Patterns
- Patterns in Parts
- Comparing Fractions
- Addition of Fraction
- Subtraction of Fraction
- Multiplication of a Fraction by a Whole Number
- Using Operator 'Of' with Multiplication and Division
- Multiplication of Fraction
- Division of Fractions
- Concept of Reciprocals or Multiplicative Inverses
Does It Look the Same?
Be My Multiple, I'll Be Your Factor
Can You See the Pattern?
- Mathematical Patterns
- Patterns in Numbers
- Pattern in Letter
- Games with Numbers
Mapping Your Way
- Map
- Enlarging Or Reducing of Pictures and Maps
- Map of India
- Mapping Space Around Us
Boxes and Sketches
Tenths and Hundredths
- Understand Relationship Between Metre and Centimetre.
- Measurement of Length
- The Decimal Number System
- Concept of Place Value
- Using Decimal Number as Units
- Conversion of Units
- Decimal Place Value
Area and Its Boundary
- Concept of Perimeter
- Concept of Area
- Measurement of Length
- Measurement of Width
- Measuring the Length of a Curved Line
Smart Charts
Ways to Multiply and Divide
- Concept of Multiplication
- Application of Multiplication
- Concept of Area
- Concept of Division
- Application of Division
How Big? How Heavy?
- Concept of Volume
- Concept of Capacity
- Volume of Cube
- Mensuration of Cylinder
- Measurement of Weight
- Decimals in money
- Decimals in length measurement
- Decimals in weight measurement
Notes
Using Decimal number as units:
1. Decimals in money:
We know that 100 paise = Rs. 1.
Therefore, 1 paise = Rs. ` 1/100` = Rs. 0.01.
2. Decimals in length measurement:
10 millimetre(mm) = 1 centimetre(cm)
100 centimetre(cm) = 1 metre(m)
1000 millimetre(mm) = 1 metre(m)
1 Kilometr e (Km) = 1000 metre(m)
1 centimetre(cm) = `1/(100) "m" or 0.01 "m"`
3. Decimals in weight measurement:
We know that 1000 g = 1 kg
Therefore, 1 g = `1/(1000)` kg = 0.001 kg.
Example
Express as rupees using decimals.
65 paise
65 paise = Rs. `65/100` = Rs. 0.65
Example
Express as cm using decimals.
7 cm and 5 mm
7 cm and 5 mm
= 7 cm + `5/10`cm
= `7 5/10`
= 7.5 cm
Example
Express as metres using decimals.
5 m and 875 mm
5 m and 875 mm
= 5 + `875/1000`
= `5 875/1000`
= 5.875 m.
Example
Express as metres using decimals.
5 m and 20 cm
5 m and 20 cm
= 5 + `20/100`
= `5 20/100`
= 5.20 m
Example
Express as kg using decimals.
2350 g
2350 g
= 2000 g + 350 g
= `2000/1000 "kg" + 350/1000 "kg"`
= 2 kg + 0.350 kg
= 2.350 kg
i.e. 2350 g = 2 kg 350 g = 2.350 kg.
Shaalaa.com | Using Decimal Numbers to Combine Units
Series: Using Decimal Numbers to Combine Units
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Money from different countries
Shivam Bank has a chart to show us how many Indian rupees we can get when we change the money of different countries.
| Country | Money | Changed into Indian Rupees |
| Korea | Won | 0.04 |
| Sri Lanka | Rupee (SL) | 0.37 |
| Nepal | Rupee | 0.63 |
| Hong Kong | Dollar (HK) | 5.10 |
| South Africa | Rand | 5.18 |
| China | Yuan | 5.50 |
| U.A.E. | Dirham | 10.80 |
| U.S.A | Dollar | 39.70 |
| Germany | Euro | 58.30 |
| England | Pound | 77.76 |
(This is the rate on 15-2-2008)
The money of which country will cost the most in Indian Rupees?
