Exercise 4 1. 168 cm 259 cm The lengths of the two planks of wood, correct to the nearest centimetre, are 168 cm and 259 cm. Calculate the upper and lower bounds for a the total length of the two planks of wood. b the difference in length of the two planks of wood.
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Step-by-step explanation:
To calculate upper and lower bounds we can divide the degree by 2 (half) and add to the rounded value for upper bound but subtract for the lower bound.
. Given 40 cm measured to the nearest 1 cm.
• Now 1 cm / 2 = 0.5 cm
. So lower bound will be 40 cm
0.5 = 39.5
• We know that the Lower bound is the smallest value that is rounded to the estimated value.
. Given 82.8 cm measured to the nearest tenth of a cm
• Now degree is nearest 10 th place or 10 cm
• So 10 / 2 = 5 cm
• Lower bound = 82.8 - 582.3 cm
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