Simplify the expressions — task. Mathematics State Board, Class 9.

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(1.5 \times 10^{19}) + (5.79 \times 10^{21})

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i \times 10^{i}

(7.684 \times 10^{21}) - (1.61 \times 10^{19})

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i \times 10^{i}

(2.26 \times 10^{12}) \times (6.049 \times 10^{- 3})

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i \times 10^{i}

(4.4 \times 10^{4}) \div (2.2 \times 10^{2})

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i \times 10^{i}

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10. Simplify the expressions