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What is the eighth question on page 92 of the fourth grade math book?
The fourth grade math book, volume one, page 92, question 8:

1, solution: 1 cm: 3km.

= 1:300000

= 1:3000006÷ 1/300000

=6X300000

= 1800000 cm

2 1800000 cm = 18 km

3. Answer:18km.

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