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How to do the exercises of decimal and unit conversion in the second volume of the fourth grade mathematics textbook?
6. 1.38km 1200m 1 170m 0.4km

7. Language 6.7 yuan 67 yuan 670 yuan 6700 yuan Mathematics 7.75 yuan 77.5 yuan 775 yuan 7750 yuan

8.7.062km 8600km2189mm2150t

9.332 * 60 =19920m =19.92km.

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