Express these numerals in the expanded form of power 10. (4) a. 5060 b.6079000 2. How many millions are there in 3 crore?(1) 3.What is the greatest number of 6 digits?(1) 4.What is the least number formed by 5 digits 4,1,8,0,7?(1) 5. Simplify: a. 18 - 7 + 9* 48/6 - 5 (1) b. 72/ 12 [ 180/4{10 +(15 - 45 /9*2)}]

Step-by-step explanation:

Solving (a): 5060 as a power of 10

We simply move the decimal between 5 and 6. The number of zeros to move backward is 4.

So,

Solving (b): 6079000 as a power of 10

We simply move the decimal between 6 and 0. The number of zeros to move backward is 4.

So,

Solving (c): 3 crore to millions

Multiply by 3

Solving (d): The greatest 6 digits

The greatest unit digit is 9. So, we simply write out 9 in 6 places

Solving (e): The least 5-digit formed from 4,1,8,0,7

To do this, we start the number from the smallest non-zero digit.

The remaining 4 digits will then be in an increasing order

So, we have:

Solving (f):

Using BODMAS

Evaluate the division, first

Then multiplication

Add up the remaining digits

Solving (g): This question is not clear.

I will assume the expression is:

Evaluate all divisions

Solve the multiplication in brackets

Remove the inner bracket

Evaluate 45 * 10

Remove the bracket

Multiply

y=1

Step-by-step explanation:

The equation for an inverse variation is

xy = k

We know x and y

6*25 =k

150 =k

The equation is xy =150

Now x = 150

150y =150

Solving for y

y =1