Year 9 Consolidation (rounding, simple interest, index laws)

Round to 2 decimal places: 0.4825

Mathematical Equivalence

ON

Round to 2 decimal places: 1.675

Mathematical Equivalence

ON

Round to 1 decimal place: 0.91

Mathematical Equivalence

OFF

Round to 3 decimal places: 0.55555

Mathematical Equivalence

OFF

Round to 3 significant figures: 12,356

Mathematical Equivalence

ON

Round to 3 significant figures: 0.004568

Mathematical Equivalence

ON

Classify the following numbers as rational, or irrational.

Groups:

(a) Rational

,

(b) Irrational

• e

• 8.3333333333

• √2

• 1.75

• √7

• 6.1212121212

An irrational number is a number which can't be represented as a (a)   ​

• Fraction of two integers
• decimal
• terminating decimal
• whole number

If a number is a decimal, it is rational if it is ​ (a)   or​ (b)  

• terminating
• recurring
• non-recurring
• more than 5 decimal places
• non-terminating

Lily invests $500 for 4 years in a bank account. She gets paid interest at 4% p.a. How much does Lily earn in simply interest over the course of the investment?

Mathematical Equivalence

ON