(a) 1 lakh = ….10… ten thousand

1,00,000 = 10 times ten thousand.

Means we need to add 10,000 ten times to get 1 lakh,

= 10,000+10,000+10,000+10,000+10,000+10,000+10,000+10,000+10,000+10,000

= 1, 00,000

(b) 1 million = …10… hundred thousand

1 million = 1,000,000

1 million = 10 ×1,00,000

And, 1 lakh = 10 ten thousand

If we add 1 lakh 10 times we get 1 million,

(c) 1 crore = ….10…. ten lakh

1 million = 10 lakh

So,

If we multiply 10 lakh 10 times we get,

1 crore = 10×10 lakh

Therefore 1 crore = 10 ten lakh

(d) 1 crore = …10…million.

So, if we add 1 million 10 times we get,

10 million which is equals to the 1 crore.

(e) 1 million = …10…. lakh.

If we add 1 lakh 10 times we get,

10 lakh which is equals to 1 million.