West Bengal Board Solutions for Chapter: Revision of Previous Lessons, Exercise 25: Let's work out 1.4

Write the following in decimal numbers:
Six hundred twenty-nine point zero zero five

Write the following in decimal numbers:
$2+\frac{3}{10}$

Write the following in decimal numbers:
$10+7+\frac{8}{1000}$

Write the following in decimal numbers:
$400+50+\frac{9}{100}+\frac{1}{1000}$

I had $₹5$. I bought pen for $₹3.50$. Let's find how much money is left in $₹$?

What must be added to $2.75$ to get $3$?

From a string of length $12.5 \mathrm{cm}$, Mira cuts off $8.5 \mathrm{cm}$. Let's find what portion of string is left?

The length of my exercise book is $22$ $\mathrm{cm}$ and its breadth is $15$ $\mathrm{cm}$. Let me find the perimeter of my exercise book in $\mathrm{cm}$.