Ex 2.6 Q3 Fractions-and-Decimals-Solutions NCERT Maths Class 7

Go back to  'Ex.2.6'

Question

 Find:

   i) \(1.3 × 10 \)

  ii) \(\rm{}36.8 × 10 \)

 iii) \(\rm{}153.7× 10  \) 

 iv) \(\rm{}168.07 × 10\)

  v) \(\rm{}31.1×100\) 

 vi) \(\rm{}156.1 × 100\) 

 vii) \(\rm{}3.62 × 100  \) 

viii) \(\rm{}43.07 × 100\)

  ix) \(\rm{}0.5 × 10 \) 

  x) \(\rm{}0.08 × 10\) 

 xi) \(\rm{}0.9 ×100\) 

xii) \(\rm{}0.03 × 1000\)

 Video Solution
Fractions And Decimals
Ex 2.6 | Question 3

Text Solution

What is known?

One decimal number and one whole number.

What is unknown?

Product of these numbers.

Reasoning:

We know that when a number is multiplied by \(10, 100\) or \(1000\) the digits in the products are same as in the decimal number but, the decimal point in the product is shifted to the right by as many places as there are zeros.

Steps:

   i) \(1.3 × 10 =13 .0 \)

  ii) \(\rm{}36.8 × 10 = 368 .0\)

 iii) \(\rm{}153.7× 10 = \rm{}1537.0\)

 iv) \(\rm{}168.07 × 10 = \rm{}1680.7\)

  v) \(\rm{}31.1×100 = \rm{}3110.0 \)

 vi) \(\rm{}156.1 × 100 = \rm{}15610.0\)

 vii) \(\rm{}3.62 × 100 = \rm{}362.0\)

viii) \(\rm{}43.07 × 100 = \rm{}4307.0\)

 ix) \(\rm{}0.5 × 10 =\rm{} 5.0 \)

  x) \(\rm{}0.08 × 10 = \rm{}0.8\)

 xi) \(\rm{}0.9 ×100 = \rm{}90.0 \)

xii) \(\rm{}0.03 × 1000 =\rm{} 30.0\)

  
Learn from the best math teachers and top your exams

  • Live one on one classroom and doubt clearing
  • Practice worksheets in and after class for conceptual clarity
  • Personalized curriculum to keep up with school