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NCERT Class 6 Solutions: Knowing Your Numbers (Chapter 1) Exercise 1.2 – Part 3

The following table shows the SI system of units:

Prefixes Put Before SI Units to Change Their Value
TextSymbolFactorPower
exaE10000000000000000001018
petaP10000000000000001015
teraT10000000000001012
gigaG1000000000109
megaM1000000106
kilok1000103
hectoh100102
decada10101
(none)(none)1100
decid0.110βˆ’ 1
centic0.0110βˆ’ 2
millim0.00110βˆ’ 3
microΞΌ0.00000110βˆ’ 6
nanon0.00000000110βˆ’ 9
picop0.00000000000110βˆ’ 12
femtof0.00000000000000110βˆ’ 15
attoa0.00000000000000000110βˆ’ 18

For example, there are 100 cm in a meter and there are 1000 meters in a km

Following diagrams illustrate the long division:

Illustration: NCERT Class 6 Solutions: Knowing Your Numbers (Chapter 1) Exercise 1.2 – Part 3
Illustration: NCERT Class 6 Solutions: Knowing Your Numbers (Chapter 1) Exercise 1.2 – Part 3

Q-9 To stitch a shirt 2 m 15 cm cloth is needed. Out of 40 m cloth, how many shirts can be stitched and how much cloth will remain?

Solution:

Illustration: NCERT Class 6 Solutions: Knowing Your Numbers (Chapter 1) Exercise 1.2 – Part 3

Therefore, 18 shirts can be stitched and 130 cm (1 m 30 cm) cloth will remain.

Q-10 Medicine is packed in boxes, each weighing 4 kg 500 g. How many such boxes can be loaded in a can which cannot carry beyond 800 kg?

Solution:

The weight of one box

Maximum load that the van can take

Therefore, number of boxes

Illustration: NCERT Class 6 Solutions: Knowing Your Numbers (Chapter 1) Exercise 1.2 – Part 3

Hence, maximum 177 boxes can be loaded in the van. 3500 g or 3.5 kg capacity will be left

Q-11 The distance between the school and a student՚s house is 1 km 875 m. Every day she walks both ways. Find the total distance covered by her in six days.

Solution:

Distance between school and house

Now,

Therefore,

Distance between school and home

Distance between home and school

Total distance covered in one day (going to school and coming back)

Therefore, distance covered in 6 days

Illustration: NCERT Class 6 Solutions: Knowing Your Numbers (Chapter 1) Exercise 1.2 – Part 3

Therefore,

Q-12 A vessel has 4 liters and 500 ml of curd. In how many glasses each of 25 ml capacity, can it be filled?

Solution:

  • Capacity of curd in a vessel
  • Capacity of one glass
  • Number of glasses can be filled
Illustration: NCERT Class 6 Solutions: Knowing Your Numbers (Chapter 1) Exercise 1.2 – Part 3