The nurse measures a school-age child as being 111 cm in height. The previous measurement was 108 cm. How many millimeters in height has the child grown between examinations?
1. 0.03
2. 0.3
3. 3
4. 30
4
Rationale 1: The difference in height between office visits is 111 – 108 = 3 cm. mm = 10 mm/1 cm x 3 cm/1. Multiply the numerators (10 x 3 = 30). Multiply the denominators (1 x 1 = 1). 30/1 = 30 cm.
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