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3-5*10-5*125 / 5-7*6-5

3–5 × 10–5 × 125/5–7× 6–5 = 3–5 × 10–5 × 53 × 57 × 6–5

= 3–5 × (5 × 2)–5 × 53 × 57 × (3×2)–5

= 3–5 × 5–5 × 2–5 × 53 × 57 × 3–5 × 2–5

 = 3–5–5 × 5–5+3+7 × 2–5–5

= 3–10× 55 × 2–10

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1/35 *1/105 *125/(1/57) *1/65

=1/243 *1/105 *125 *57*1/65

= 0.004*0.00001 *125*78125* 1.28

= 0.5

hope its correct!

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