Answer:
(9.3 × 10⁶) + (1.8 × 10⁴) =
(9.3 × 10² × 10⁴) + (1.8 × 10⁴) =
(9.3(10²) + 1.8) × 10⁴ =
931.8 × 10⁴ =
9.318 × 10⁶
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