Rational and Irrational Numbers 2

Rational and Irrational Numbers 2Projector Resources

Rational and Irrational Numbers 2

Projector Resources

Rational and Irrational Numbers 2Projector Resources

Poster with Headings

P-2

Rational and Irrational Numbers 2Projector Resources

Instructions for Always, Sometimes or Never True

P-3

1. Choose a statement.• Try out different numbers. • Write your examples on the statement card.

2. Conjecture: decide whether you think each statement is always, sometimes or never true. • Always true: explain why on the poster.• Sometimes true: write an example for which it

is true and an example for which it is false. • Never true: explain why on the poster.

Rational and Irrational Numbers 2Projector Resources

Always, Sometimes or Never True?

The sum of a rational number and an irrational number is irrational.

True for: False for:

P-4

Rational and Irrational Numbers 2Projector Resources

Always, Sometimes or Never True?

The circumference of a circle is irrational. True for: False for:

P-5

Rational and Irrational Numbers 2Projector Resources

Always, Sometimes or Never True?

The diagonal of a square is irrational. True for: False for:

P-6

Rational and Irrational Numbers 2Projector Resources

Always, Sometimes or Never True?

The sum of two rational numbers is rational. True for: False for:

P-7

Rational and Irrational Numbers 2Projector Resources

Always, Sometimes or Never True?

The product of a rational number and an irrational number is irrational.

True for: False for:

P-8

Rational and Irrational Numbers 2Projector Resources

Always, Sometimes or Never True?

The sum of two irrational numbers is irrational. True for: False for:

P-9

Rational and Irrational Numbers 2Projector Resources

Always, Sometimes or Never True?

The product of two rational numbers is irrational.

True for: False for:

P-10

Rational and Irrational Numbers 2Projector Resources

Always, Sometimes or Never True?

The product of two irrational numbers is irrational.

True for: False for:

P-11