Samacheer Kalvi 4th Maths Guide
Term 1
Chapter 4
Measurements
Ex 4.5
Question
1.
Convert
into cm
(a) 5m
(b) 7m
(c) 9m
(d) 16m
Answer:
(a) 5m
5m =
5 × 100
= 500 cm
(b)
7m
7m = 7 × 100
= 700 cm
(c) 9m
9m = 9 × 100
= 900 cm
(d)
16m
16m =
16 × 100
= 1600 cm
Question
2.
Convert
into m
(a) 6000
cm
(b) 4000
cm
(c) 13000
cm
(d) 17000
cm
(a) 6000 cm
6000 cm =
6000 ÷ 100
= 60 m
(b) 4000
cm
4000 cm =
4000 ÷
100
= 40 m
13000 cm = 13000 ÷ 100
= 130 m
(d) 17000
cm
17000 cm =
17000 ÷
100
= 170 m
Raju used 13 m 25 cm ribbon for making his project. If he had bought 20 m of ribbon, How much ribbon is left with him?
Answer:
Total length of ribbon =
20 m 00cm
Raju used = 13 m 25 cm
Remaining length of ribbon = 6 m 75 cm
Question
6.
The
distance between bus stand and school is 81 m 40 cm and the distance between
school and temple is 20 m 10 cm. What is the total distance from bus stand to
temple ?
Answer:
Distance between bus stand to school = 81 m 40 cm
Distance between school to temple = 20 m 10 cm
Distance between bus stand to temple is = 101 m 50 cm
Question
7.
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?
Answer:
Length of
wood =
4m
= 4000
millimeter
It is
divided into two equal parts = 2000 + 2000
Length of
each piece =
2000
millimeter.
Question
8.
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?
Answer.
Total
length of cloth =
10 m =
1000 cm.
size to
sew four fabrics =
4 × 160
= 640 cm =
6 m 40 cm
can sew
four curtains.
360 cm
cloth is balance.
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