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Q.2.    Find the number from each of the following expanded forms:

          $(a)\: 8\times 10^{4}+6\times 10^{3}+0\times 10^{2}+4\times 10^{1}+5\times 10^{0}$

          $(b)\: 4\times 10^{5}+5\times 10^{3}+3\times 10^{2}+2\times 10^{0}$

          $(c)\: 3\times 10^{4}+7\times 10^{2}+5\times 10^{0}$

          $(d)\: 9\times 10^{5}+2\times 10^{2}+3\times 10^{1}$

Answers (1)

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$(a)\: 8\times 10^{4}+6\times 10^{3}+0\times 10^{2}+4\times 10^{1}+5\times 10^{0}$

$=8\times 10000+6\times 1000+0\times 100+4\times 10+5\times 1$

$=80000+6000+000+40+5$

$=86045$

$(b)\: 4\times 10^{5}+5\times 10^{3}+3\times 10^{2}+2\times 10^{0}$

$=4\times 100000+0\times 10000+5\times 1000+3\times 100+0\times 10+2\times 1$

$=400000+00000+5000+300+00+2$

$=405302$

$(c)\: 3\times 10^{4}+7\times 10^{2}+5\times 10^{0}$

$=3\times 10000+0\times 1000+7\times 100+0\times 10+5\times 1$

$=30000+0000+700+00+5$

$=30705$

$(d)\: 9\times 10^{5}+2\times 10^{2}+3\times 10^{1}$

$=9\times 100000+0\times 10000+0\times 1000+2\times 100+3\times 10+0\times 1$

$=900000+00000+0000+200+30+0$

$=900230$

Thus, the above problems are simplified in simpler forms.

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mansi

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