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Measurements | Term 1 Chapter 4 | 4th Maths - Exercise 4.5
1. Convert into cm
a) 5m
1 m = 100cm
5m = 5 x 100 = 500cm
Answer : 5m = 500cm
b) 7m
1 m = 100cm
7m = 7 x 100 = 700cm
Answer : 7m = 700cm
c) 9m
1 m = 100cm
9m = 9 x 100
= 900cm
Answer : 9m = 900cm
d) 16m
1 m = 100cm
16m = 16 x 100
= 1600cm
Answer : 16m = 1600cm
2. Convert into m
a) 6000cm
100cm = 1m
6000cm = 6000 ÷ 100
6000/100 = 60m
Answer : 6000cm = 60m
b) 4000cm
100cm = 1m
4000cm = 4000 ÷ 100
4000 / 10 = 40m
Answer : 4000cm = 40m
c) 13000cm
100cm = 1m
6000cm = 6000÷100 (Example reference)
13000 / 100 = 130m
Answer: 13000cm = 130m
d) 17000cm
100cm = 1m
17000cm = 6000÷100 (Example reference)
17000 / 100 =170m
Answer: 17000cm = 170m
3. Add
4. Subtract
5. Word Problem
Raju used 13m 25cm ribbon for making his project. If he had bought 20m of ribbon, How much ribbon is left with him?
Total length of ribbon, Raju bought = 20m 00cm
Length of ribbon used = 13m 25cm
Ribbon left with Raju = 6m 75cm
Answer : Ribbon left with Raju = 6m 75cm
6. Word Problem
The distance between bus stand and school is 81m 40cm and the distance between school and temple is 20m 10cm. What is the total distance from bus stand to temple ?
Distance between bus stand and school = 81m 40cm
Distance between school and temple = 20m 10cm
Total distance = 101m 50cm
Answer : The total distance from bus stand to school = 101m 50cm
7. Word Problem
Arul has a 4 metre long piece of wood. He wants to cut it into 2 equal lengths. How long should each piece be in millimetres?
Length of wood = 4m
Length of wood cut into 2 equal lengths = 4 ÷ 2 = 4/2 = 2m
Length of each piece of wood = 2m
1m = 1000 mm
2m = 2 x 1000 = 2000mm
Answer : Length of each piece of wood in millimeters = 2000mm
8. Word Problem
Amudha knows tailoring. She bought 10 metre long cloth. She needs 4 curtains to be stitched. Each curtain's height is 160cm. Would she be able to stitch all curtains? If some cloth is left behind, how much would it be and could you please suggest her to stitch something else?
Height of one curtain = 160 cm
Height of four curtains = 160 x 4
= 640 cm
Total length 10m = 10 x 100 cm = 1000 cm
Length of cloth bought = 1000 cm
Length of cloth used = 640 cm
Length of cloth left behind = 360 cm
Tags : Measurements | Term 1 Chapter 4 | 4th Maths , 4th Maths : Term 1 Unit 4 : Measurements
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