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Mathematics, 18.02.2021 20:40 jbutler7995

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$4.64 + \times {10}^{6} + 2.59 \times {10}^{4} - 679.38 \times {10}^{4}$
$3.12 \times {10}^{3} \times 0.45. \\ \times {10}^{ - 1}$
$0.28 \times {10}^{5} \times 0.91 \times {10}^{2}$
$\frac{0.15 \times {10}^{4} }{2 \times {10}^{2} }$
$\frac{35 \times {10}^{7} }{70 \times {10}^{8} }$

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