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Significant Numbers Using Standard form Significant Numbers www.mathsrevision.com Int 2.

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Presentation on theme: "Significant Numbers Using Standard form Significant Numbers www.mathsrevision.com Int 2."— Presentation transcript:

1 Significant Numbers Using Standard form Significant Numbers Int 2

2 Starter Int 2

3 Learning Intention Success Criteria 1.To know the meaning of significant number. 1.To understand the term significant numbers for decimals and whole numbers. 2.Apply knowledge to problems. Int 2 Significant Numbers

4 Int 2 Significant Numbers In mathematics a figure or digit is significant if it gives an idea of both: (i)Quantity (ii)Accuracy It is similar to rounding and all to do with zero’s

5 Int 2 Significant Numbers Decimal numbers significant figures 2 significant figures What is the first rule? 0’s at the beginning DON’T count significant figures 3 significant figures What is the second rule? 0’s in the middle DO count significant figures 2 significant figures What is the third rule? 0’s a the end DO count

6 Int 2 Significant Numbers Easy rule :Just remember 0’s at the beginning DON’T count Exercise : Round to 2 sig figures

7 Int 2 Significant Numbers Whole Numbers significant figures 4 significant figures What is the rule 360 ? 2 / 3 significant figures 0’s in the middle DO count 0’s at the end MAY or MAY NOT count depending on the question. There are 360 degrees in a circle. 358 to the nearest ten is significant figures 2 significant figures

8 Int 2 Significant Numbers Easy rule :0’s at the end MAY or MAY NOT count Exercise : Round to 2 sig figures

9 Now try MIA Ex 1 Ch16 (page 3) Int 2 Significant Numbers

10 Starter Int 2

11 Learning Intention Success Criteria 1.Convert between and normal form and scientific notation. 1.Work with a calculator to solve problems to specific significant figures. Also convert between normal form and scientific notation. 2.Use calculator to work problems to a specific significant figures. Int 2 Significant Numbers

12 Int 2 Significant Numbers Standard Form / Scientific Notation Normal mode ≤ a < 10 n = Integer Number Sig. fig. 2 Sig. fig. 4 Sig. fig. Standard form always indicates the number of significant figures

13 Now try MIA Ex 2 Ch1 (page 5) Int 2 Significant Numbers


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