GCSE Mathematics Number 2

Round 0.1452 to 3 decimal places

0.145

Round 23.456 to 1 decimal place

23.5

Round 0.05457 to 1 significant figure

0.05

Round 2.3457 to 2 significant figures

2.3

Round 78.5457 to 2 significant figures

79

Round 3456 to 2 significant figures

3500

6.735

5.65

What does SUM mean?

adding two or more numbers or amounts together.

What does PRODUCT mean?

multiplying two or more numbers together.

What is the reciprocal of 8?

1/8.

How do you add or subtract fractions?

Find a common denominator, convert the fractions, and then add or subtract the numerators.

How do you multiply fractions?

Multiply the numerators together and the denominators together, then simplify if necessary.

How do you divide fractions?

“Keep, change, flip” keep the first fraction, change divide to multiply and turn the second fraction upside down then multiply in the usual way

What type of sequence is 3 4 7 11 18 29 ?

This is a Fibonacci sequence, where each term is the sum of the two preceding ones.

To decrease by 15% multiply by ….

0.85

To increase by 12% multiply by …

1.12

To increase by 1.2% multiply by ….

1.012

What is the formula used for increasing or decreasing by a percentage?

% x original = new

simplify