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Estimating & Rounding. Natalia Sivackova. References. Pages 63-65 (Rounding) Page 68 (Estimation) HW pg. 70 #1-5, 15. Rounding. Definition: the process of approximating a number to a given degree of accuracy. Rules:. If the digit after the one that is being rounded is less than 5…
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Estimating & Rounding Natalia Sivackova
References Pages 63-65 (Rounding) Page 68 (Estimation) HW pg. 70 #1-5, 15
Rounding Definition: the process of approximating a number to a given degree of accuracy
Rules: If the digit after the one that is being rounded is less than 5… Don’t change number Make all numbers to the right of it 0 If the digit after is more than 5… Add one to the rounded digit All numbers to the right, 0
Example 2.2.1a (from book) 2700 2800 2730 Since 3 is less than 5, we keep the 7 and change all the numbers to the right to 0 The GNI per capita in Algeria is $2730 Round to the nearest hundred dollars. Solution: Visually With Rules
Estimation Definition: an approximation that is usually used to check the reasonableness of an answer
Example 126.8 x 48.6 100 x 50 = 5000