Q. 1543.5( 2 Votes )

Write in expanded form:

A. 74836

B. 574021

C. 8907010

Answer :

A. 74836


= 7 × 104 + 4 × 103 + 8 × 102 + 3 × 10 + 6


B. 574021


= 5 × 105 + 7 × 104 + 4 × 103 + 0 × 102 + 2 × 10 + 1


C. 8907010


= 8 × 106 + 9 × 105 + 0 × 104 + 7 × 103 + 0 × 102 + 1 × 10 + 0


[Use the fact that, Any number, say, ”anan - 1an - 2….a1a0 can be expanded as :


= an × 10n + an - 1 × 10n - 1 + an - 2 × 10n - 2 + an - 3 × 10n - 3 + … + a1 × 101 + a0 (note, n is the no. of digits of the number),


[this tells you why to look for greater digits from left side, while comparing two numbers. Ask yourself, how! ]


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