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Express as centimetres (cm), metres (m), Kilometres (km) using Decimals- word problem

Express as centimetres (cm), metres (m), Kilometres (km) using Decimals- word problem. 7. 7. 8. 8. 6. 6. 10. 100. 78.6 100. 78.6 10. 78.6 100 = .786. 78.6 10 = 7.86. Recap. Dividing a decimal number by 10. Example.

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Express as centimetres (cm), metres (m), Kilometres (km) using Decimals- word problem

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  1. Express as centimetres (cm), metres (m), Kilometres (km) using Decimals- word problem

  2. 7 7 8 8 6 6 10 100 78.6 100 78.6 10 78.6 100 = .786 78.6 10 = 7.86 Recap Dividing a decimal number by 10 Example To divide number by 10 , we move decimal point one step to the left = Dividing a decimal number by 100 Example To divide number by 100 , we move decimal point two step to the left =

  3. 6 7 8 1000 786 1000 786 1000 = .786 Recap Dividing a decimal number by 1000 Example To divide number by 1000 , we move decimal point three step to the left =

  4. Relationship between millimetre (mm) and centimetre (cm) 10 mm = 1 cm Rule: To convert mm into cm we need to divide the mm by 10. Therefore, 1 mm = cm 25 mm = cm 175 mm = cm Relationship between centimetre (cm) and metre (m). 100 cm = 1 m Rule: To convert cm into m we need to divide the cm by 100. Therefore, 1 cm = 42 cm = 320 cm =

  5. Relationship between metre (m) and kilometre (km). 1000 m = 1 Km Rule: To convert m into Km we need to divide the m by 1000. Therefore, 1 m = 75 m = 240 m =

  6. Example 1:Anitha bought a rod which is 302 mm long. Express in cm. Solution: Length of the rod = 302 mm To convert mm into cm we need to divide 302 mm by 10. So, 302 mm = cm = 30.2 cm (After converting fraction into decimal) Ans: Length of the rod = 30.2 cm Example 2: Deepan had a tie of length 78 mm. Express in cm. Solution: Length of a tie = 78 mm To convert mm into cm we need to divide 78 mm by 10. So, 78 mm = cm = 7.8 cm (After converting fraction into decimal.) Ans: Lenth of a tie = 7.8 cm

  7. Example 3: Breadth of a rectangular plot is 42 cm. Express in m Solution: Breadth of a rectangular plot = 42 cm To convert cm into m we need to divide 42 cm by 100. So, 42 cm = = 0.42 m (After converting fraction into decimal) Ans: Breadth of a rectangular plot = 0.42 m Example 4: Tharun had a long jump record of 234 cm. Express in m. Solution: Height of a long jump = 234 cm To convert cm into m we need to divide 234 cm by 100. So, 234 cm = = 2.34 m (After converting fraction into decimal) Ans: Height of a long jump = 2.34 m

  8. Example 5: Ditance from a hotel to office is 126 m. Express this in km Solution: Distance travelled = 126 m To convert m into Km we need to divide 61m by 1000. So, 126 m = = 0.126 Km (After converting fraction into decimal) Ans: Distance travelled = 0.126 km Example 6: An aeroplane flew at a distance of 12346 m height. Express in km Solution: Height of an aeroplane = 12346 m To convert m into Km we need to divide 12346m by 1000. So, 12346 m = = 12.346 Km (After converting fraction into decimal) Ans: Height of an aeroplane = 12.346km

  9. Try these • One side of a square is 76 mm .Express in cm. • Height of a triangle is 234 cm. Express in m. • A train travelled at a speed of 1288 m. Express in Km.

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