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49. to the left two spaces (place values)

50. 4.35 m

51. to the right three spaces (place values)

52. 12,000 mL

53. to the right six spaces (place values)

54. 3,000,000

Step-by-step explanation:

49. 1 centimeter is equal to of a meter. In other words, there are 100 cm in 1 meter. To convert from cm to m, you would move the decimal to the left because meters are larger than centimeters meaning a large number of centimeters would convert to a smaller number of meters. The decimal will move two places because there are 100 cm in 1 meter. (look at the number of zeros to determine how many spaces to move)

50. Follow the rule from the 49:

435.00 → 4.35

51. 1 liter is equal to 1000 milliliters. This means the number will increase, moving the decimal to the right. The decimal will move three places because each place value equals 10x and 10 · 10 · 10 = 1000. (look at the number of zeros to determine how many spaces to move)

52. Follow the rule from 51:

12.00 → 12,000

53. 1 megameter is equal to 1,000,000 meters. This means the number will increase, moving the decimal to the right. The decimal will move six spaces because each place value equals 10x. 10 · 10 · 10 · 10 · 10 · 10 = 1,000,000 (look at the zeros to determine how many spaces to move)

54. Follow the rule from 53:

3.00 → 3,000,000