Rounding and Ordering

Rounding and Ordering

By Muhammad Ahsan

Terminology

Rounding and Ordering

Degree of accuracy: Tingkat akurasi, the number of decimal places you are working to.

Decimal places: ​angka di belakang titik

Significant​ figures: non-zero number from left to right

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If the right number is 5 or more, increase by 1.

​= 0.02 (2 decimal places)

= 2.190 (3 decimal places)

=​ 0.0008 (4 decimal places)

Convert Number

​

​

​0.023

2.18951​

0.000748​

O.G Number

Converting to n decimal places

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• The first significant figure in a number is the first non-zero digit you get to when you move along the number from left to right.

• ​If the next digit is 5, 6, 7, 8 or 9, round up.

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Significant Figures

Significant Figures Worked Example

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Multiple Choice

Round to 2 significant figures

0.63799

• 0.6

• 0.63

• 0.64

• 0.638

Ordering Operation

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Multiple Choice

$$\frac{25+2^2\times\left(3+2\right)}{5}-10=$$  

• 9

• -1

• 1

• 5

Poll

Choose your feeling

• Understand

• Little bit understand

• Confuse