7th Class Mathematics Exponents and Power

  • question_answer 14) Write the following numbers in the expand forms: (i) 279404,                           (ii) 3006194,                        (iii) 2806196,                       (iv) 120719,

    Answer:

                    279404 \[279404=2\times 100000+7\times 10000+9\times 100\]\[+4\times 100+0\times 10+4\times 1\] \[=2\times {{10}^{5}}+7\times {{10}^{4}}+9\times {{10}^{3}}+4\times {{10}^{2}}+0\times {{10}^{1}}+4\times {{10}^{0}}\] (ii) 3006194 \[3006194=3\times 1000000+0\times 100000+0\times 10000+6\]\[\times 1000+1\times 100+9\times 10+4\times 1\]\[=3\times {{10}^{6}}+0\times {{10}^{5}}+0\times {{10}^{4}}+6\times {{10}^{3}}+1\times {{10}^{2}}\]\[+9\times {{10}^{1}}+4\times {{10}^{0}}\] (iii) 2806196 \[2806196=2\times 1000000+8\times 100000+0\times 10000\]\[+6\times 1000+1\times 100+9\times 10+6\times 1\] \[=2\times {{10}^{6}}+8\times {{10}^{5}}+0\times {{10}^{4}}+6\times {{10}^{3}}+1\times {{10}^{2}}\]\[+9\times {{10}^{1}}+6\times {{10}^{0}}\] (iv) 120719 \[120719=1\times 100000+2\times 10000+0\times 1000+7\times 100\]\[1\times 10+9\times 1\] \[=1\times {{10}^{5}}+2\times {{10}^{4}}+0\times {{10}^{3}}+7\times {{10}^{2}}+1\times {{10}^{1}}\] \[9\times {{10}^{0}}\] (v) 20068 \[20068=2\times 10000+0\times 1000+0\times 100+6\times 10+8\times 1\] \[=2\times {{10}^{4}}+0\times {{10}^{3}}+0\times {{10}^{2}}+6\times {{10}^{1}}+8\times {{10}^{0}}\]

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